... Wiring Connectors, Crankshaft Sensor, Camshaft Sensor, 3 Pins, Black, Each. It’s a good idea to start diagnosing P0118 in your Sonic at the wiring harness. The connection that went to the original block was cut. Crimp two wire eyelets to each end of the ground wire. Cut a length of wire that will reach from the fuse box to the gauge location. A simple test for this terminal is to use a test light. Set the emergency brake. As you look at the end of the terminals on the sender, they form a V. The wire for the temp light SHOULD BE V< on this side of the V. The terminal on this side >V, SHOULD go to the TCS relay. I have been having a problem with the temp gauge in my 99 chevy pu. Strip both ends of the wire. I have it mounted between #6 and #8 cylinder right now. ... Click the button below to add the GM Single Wire Coolant Temperature Sender Connector to your wish list. When I put my big block in my car, the one thing I haven't figured out yet is hooking up the factory temp gauge. I do have a 72 Chevy service manual but the electrical diagram doesn't seem to distinguish enough what goes on with the temp sending unit(s?) As is said earlier, the temp terminal of the sender goes to ground when the temperature gets too hot (probably 125-140F), and the TCS terminal is a ground when the engine is cold. Tighten the nut with a socket. The temperature gauge on your Chevy 350 just stopped working entirely what are ... check the power to gauge and the temperature sensor (tps). On V8 engines the wire runs from the firewall bulkhead connector to the back of the intake manifold, then along the left side of the intake where it will drop down from the valve cover directly to the sender near the left front of the engine between cylinders 1 … Where do the sending units go? i hope to got the right one. Each part ought to be set and connected with other parts in specific manner. Connect the black lead of the digital ohm meter to a solid grounding. 7. I haven't trusted this temp gauge for a while now and would like to get away from an electrical sensor altogether. The TPS on a Chevrolet truck is the throttle position sensor. It reads normal for about 15 to 20 min. The 1993 Chevrolet 1500 had five engine options ranging from as small as a 160-horsepower, 4.3-liter V-6 to a 230-horsepower, 7.4-liter V-8. Wire 1508 is located at P4 (the bus bar) and is then "addressed" to splice 3 … Chris Stevenson has been writing since 1988. Tighten the bracket bolts with a socket while adjusting the face of the gauge. When I bought the car with the small block in it, it had an aftermarket temp gauge mounted under the dash because the previous owner couldn't get the in-dash one to work with only one temp sender on the small block. If it doesn't, then ground the other wire. Have two choices. Part Number: HLY-570-223. With the wiring connected to the sensor the voltage will be lower, but how much lower depends on the temperature of the sensor. Does your car have a gauge or an idiot lite or both? Testing the coolant temperature sensor is a very quick process. Stevenson holds a P.D.S Toyota certificate, ASE brake certification, Clean Air Act certification and a California smog license. now one with two pongs. From your previous post, assuming thebig block is supposed to have two sending units, I would imagine one of the sending units operates the gauge, and the other is for the TCS system, which is disabled on my car. With the wiring unplugged from the temperature sensor, the voltage should be close to 5 volts on the yellow wire. At location J13, circuit 150E is the ground wire from pin C of the servo connector. Unfortunately I have the car stored 100 miles away, so I can't run out and try anything anyone tells me until spring, butI will take notes, and work from memory. If everything is in working order on your car (yours has the light, right), here is a simple test. ... Wiring Connectors, Coolant Temperature Sensor Extension, 36 in., 2 Pin, Each. There is a pipe plug in each head and at least one in the intake manifold that can be used for this purpose. Refer to your owner's manual for the location of your existing temperature sensor wire. Get back into the cab and cut the wire, allowing enough slack to hook it to the back of the gauge at the dashboard. Reconnect the negative battery cable and start the engine. so the lights and wires should be ok. Sensor, Coolant Temperature, M12 x 1.5 Thread Size, Brass, Natural, Chevy, Pontiac, 5.7L LS, Each. Other wires can be found in the side of the engine block, where the sensor probe screws into a mounting flange. GM Chevrolet GMC Buick Cadillac Oldsmobile Pontiac: Engines: Various General Motors engines: ... GM 2 Wire Coolant Temperature Sensor Connector $11.25 $8.99. Locate your fuse box inside the passenger cabin. Have someone look at your dash to see if the red temp light comes on. because the old temperature sending unit was out of order, i bought a new one. Strip both ends of the wire, which will be the ground wire. Find CHEVROLET 5.7L/350 Chevy small block Gen I Coolant Temperature Sensors Natural Coolant Temperature Sensor Finish and get Free Shipping on Orders Over $99 at Summit Racing! PM me for more information. There are two sensors or sending units at the front of the engine. 4. I don't know if a car with a gauge and a car with a temp light use 2 different senders, but either car uses only one sender with 2 terminals. When I took the engine in to the shop for the rebuild, one was in the intake, and another was in the driver's side head. It’s also cheap and easy to diagnose. It does move a bit, so I know it physically works, but can't get it to read a temperature. Push the gauge into its mounting hole. I was told by Jasper to use a sensor from an '87 350. First, locate the plug with the 2 wires that originally plugged into the sender. Connect it to the sensor probe. P0118: Engine Coolant Temperature (ECT) Circuit High Input. Measure out a length of 14-gauge wire and run the end of the wire through a grommet on the firewall underneath the dashboard. One is on top of the intake manifold cover to the left of the thermostat housing and has two wires leading to it. I was told by Jasper to use a sensor from an '87 350. Chevrolet Performance 15326386 - Chevrolet Performance Coolant Temperature Sensors Coolant Temperature Sensor, Brass, Natural, 3/8 in. Do you know if big blocks used two seperate sending units? I was told they did. if no power broken wire or short to ground. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! The first thing we should briefly discuss becomes the location of the Chevrolet coolant temperature sensor. Replace your engine coolant temperature sensor on a Chevy 1500 Suburban or truck in just a few min. On my 1972 Chevy C10 350 truck - Can I replace the stock temp sensor with an after-market mechanical sensor?If so, can I use the stock sensor location for the after market unit? The motor was re-man by jasper and a '71 sensor won't fit as the heads are aftermarket. Connect the other ground wire eyelet to the ground wire terminal marked "G" on the gauge. Any help would be greatly appreciated. The temp at the old sensor between #1 and #3 is … And I don't know which wire goes to which terminal. Strip the end of the sender wire with wire strippers and crimp a wire eyelet on the end of it. Make sure no components exist behind the mounting location. Twist one end of the wire and place it under the spade fuse connector. with a 7.4 engine. I used an infrared temp gauge and get just shy of 200 above the thermostat(new 195 installed). Basically a 50/50 chance of getting it right or wrong. Part Number: ICB-WECTS30-36. Coolant temp sensor is bad. I am left with one wire with two terminals. This can be any solid piece of metal. Where to connect temp sensor on 350 Chevy? Raise the hood and disconnect the negative battery cable with a socket. 5. Guide the wire up into the dashboard and through the back side of the gauge hole. This is an idiot light (not a temp. Then after the engine is running and up to operating temp, do the same thing and the test light should NOT light. Part Number: ADO-12551708 Go along each wire and use tie straps to secure each wire to a frame or wire loom. I replaced an old water temperature gauge with a new one , I show how I installed it. From underneath the dashboard, reconnect the gauge mounting bracket and spread the bracket arms to contact the metal dashboard surface. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Start by inspecting where the harness plugs into the Temp Sensor. The motor was re-man by jasper and a '71 sensor won't fit as the heads are aftermarket. All five engines used a small sensor, known as a coolant temperature sensor, to send the temperature reading of the coolant to the temperature … Look for a screw under the dashboard that is attached to the metal frame. For a better experience, please enable JavaScript in your browser before proceeding. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. TOO EASY. Pull the wire through from the engine compartment. Fasten a nut on the gauge terminal with a socket. My 1971 chev. It’s often the reason why the code was thrown. Add to Compare. What do I do with the other wire?? This generic powertrain/engine diagnostic trouble code typically applies to all OBDII equipped engines, but shows up more often in certain Audi, BMW, Chrysler, Dodge, Ford, Jeep, Mazda, Mitsubishi, and VW vehicles. A temperature gauge is one of the most important sensor gauges on any vehicle with an internal-combustion engine that uses a radiator and cooling jackets. 05-23-17 06:33 PM - Post# 2692561 In response to acardon Acardon ..... . Wiring Issue. ok4450 said, “You’re not confusing an ECT sensor with a temp sensor used for other fuctions are you; as in temp gauge operation, cooling fan sensors, etc, etc?” Nevada_545 said, “The coolant temp sender for the gauge has one wire, dark green. P0073 is a diagnostic trouble code (DTC) for "Ambient Air Temperature Sensor Circuit High input". Your reply about the wiring of the temp sending unit got me thinking. Car has an idiot light only. Route the wire until you reach the sensor position. As far as I know, (keep in mind we are talking FACTORY here) the correct temp sender (one only) has 2 terminals. A vehicle owner can wire a temperature gauge in his or her vehicle in a driveway or garage. Place the eyelet over the gauge stud marked "S." Connect it to the sensor probe. gauge). Coolant temp sensor's wires are shorted to each other. :thumbsup: Anyone else have any experience with this? I guess I'll find out if this works if the car ever overheats. On the V-8 models it's next to the number one spark plug wire boot. Authentication and pre-purchase inspection service still available. Which one is supposed to operate the gauge? (this is for '70). JavaScript is disabled. Place the vehicle in park or neutral, depending upon its transmission type. I had a tough time finding the correct second wire on the firewall to connect to the second sending unit to since there were actually three possible wires it could be. I tried several different combinations of the three wires I thought could be the right ones two at a time on the senders, and the gauge never worked. The coolant temperature sensor on a Chevrolet engine is used by the vehicle's computer to determine how hot or cold the coolant flowing through the engine block is at any given time, so that the computer knows how to properly run the engine. If the sensor isn't working correctly, the computer isn't sending the right amount of fuel to the engine. Add to Wishlist. The wire you're looking for is dark green. 350 has a temp sensor that has one terminal. This will be the "Sender" wire. Cut a length of wire that will reach from the back of the gauge to the screw hole. Get a short piece of wire for a jumper. I connected this wire to the single terminal and was told to just tape off and leave disconnected the green wire with the white stripe. Coolant temp sensor's wires are shorted to Ground. A temperature gauge is one of the most important sensor gauges on any vehicle with an internal-combustion engine that uses a radiator and cooling jackets. PCM is bad. O2 Sensor Wiring Diagram Chevy – o2 sensor wiring diagram chevy, o2 sensor wiring diagram chevy silverado, Every electric arrangement is made up of various unique pieces. i put the 1st wire to ground and the red light goes on. Engine temperature directly affects combustion and moving internal parts. Otherwise, the structure will not function as it ought to be. The Gentlemen: I have learned that the '71 Chevelle has a temp. Most temperature gauges mount from the backside, with holding brackets that are already installed on the gauge. 6. My 1971 chev. I recently replaced my thermostat when my lower radiator hose clamp failed and i lost my coolant . Crimp a wire eyelet on the end of the wire and attach it to the gauge terminal marked "I." Some are connected to the top of the thermostat housing, attached to a sensor probe. I have tested my thermostat, coolant temp sensor, and temp sending unit. My temperature gauge doesnt work. When I ground the solid green wire the temp light comes on. Connect one wire end to the ground screw and tighten the screw with a screwdriver. Tom- what don't you know???? Fit the gauge in the hole to size it, then remove it. Go to the engine compartment and crimp a male plug or female socket wire connector on the sender wire. The connection that went to the original block was cut. Note the function of the temperature gauge as the engine warms up. Remove the fuse box lid and find a 12-volt fuse that has power; the cigarette lighter fuse or radio fuse will work. Engine temperature directly affects combustion and moving internal parts. I have a 1985 chevy k10 pickup with a 305. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. and then it goes all the way over to hot. 06-10-09 03:09 PM - Post# 1714745 i have a 64 impala ht with 350cui small block. 350 has a temp sensor that has one terminal. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, RX7.org: How to Install a Temperature Gauge, Livorsi.com: Temperature Gauge and Sender, Miata.net: Electrical Oil and Mechanical Water Temp Gauge Install. It was a wire soldered on to the back of the sensor." Search for a location on your dashboard for the gauge. Stick the piece wire into one side of the plug and touch it to a good ground. Find CHEVROLET Wiring Connectors and get Free Shipping on Orders Over $99 at Summit Racing! In your response you refer to a temp sending unit that has two connections. Use a hole saw and drill motor to drill a hole that matches the diameter of the temperature gauge flange. This sensor tells the computer how far open the throttle body is at any point, and adjusts the fuel and spark mixture accordingly. My cars, plus, the wiring diagram supports this. Make sure the sender wire in the engine compartment does not touch a heated component or contact a moving part. I connected it to the sensor. How do I troubleshoot this.I have a chevy 2500, 5.7L 350. The original must have some wire chafing as it was intermittent and not accurate. At location M13, wire 150A connects to pin C of the six terminal connector. His automotive vocation has spanned more than 35 years and he authored the auto repair manual "Auto Repair Shams and Scams" in 1990. 150A at location M13 mates to wire 150E, which is addressed J13. 96 vortec engine sensor diagram wiring library chevy 5 7 wiring diagram online wiring diagram 4 3l vortec engine diagram 11 fearless wonder de v8 vortec engine diagram 11 fearless wonder de turn key engine supply performance engines engine parts solved firing order diagram for 1996 blazer 4 3 eng fixya chevy s10 vacuum hose diagram in addition. Doesn't display the full temp. I have a hard time believing it's the ecm also , that is what the GM tech thought , all he had me check was spark , fuel pump operation , power and ground , I would lean more towards a sensor/wire not telling the ecm to activate/turn on the spark and or fuel , also the tester/programmer that comes with the ecm/harness … Detach the small gauge bracket with a socket if it doesn't fit initially. I need to know where the wire is up under the dash that goes to the temperature gauge on the dash to the temperature … one solid green and the other is green with a white stripe. What do I do with a one terminal sensor and two wires???? Tighten the nut with a socket. Remember the location. I discovered by grounding the solid green wire with the ignition on, the hot light comes on. NPT, for use on Acura®, Honda®, AMC, Chevy, Isuzu, Pontiac Part Number: NAL-15326386 After that, inspect the harness for wiring problems. DZ- I'm trying to figure this one out too...cars with gauges use two senders, one in the right head with two terminals, for the TCS, and one in the left head, with a pin on type connector, for the gauge. Run the wire through the back of the gauge into the driver's compartment. after that, i tried the other wire to the ground and the green light gous on. On both the V6 4.3 L Vortec engine and the 4.8 L, 5.3 L and 6.0 L V-8 engines, they locate the coolant temperature sensor on the driver side cylinder head. Start and let the engine run. With test light there is no current with switch on to the wire going to the stock sensor. It just says if it's HOT. With the use of a digital volt-ohm meter you can easily tell if the sensor is faulty or not. Touch the test light clip to the + bat post and the test light to the TCS terminal, it should light. Without a temperature gauge, the engine would be subject to various modes of heat without the operator's knowledge, and this could lead to bearing failure and engine seizure. Use wire cutters to cut a notch in the bottom lip of the fuse box lid and place the wire in the notch as you refasten the fuse box lid. sensor with two terminals. Remove the screw with a screwdriver. If it is overheating, thats all it says. The one problem is that there is two wires and two terminals on the sender. Leave it disconnected and tape it off??? HA Dennis. My aftermarket heads from Jasper allow for a one terminal 3/8" sensor from an '87 chev. Summit Racing light clip to the chevy 350 temp sensor wiring terminal, it should light, with holding brackets that are installed... Function of the engine is running and up to operating temp, do the same and... Jasper allow for a jumper that there is no current with switch on to original! Fuse connector i ground the solid green wire with the 2 wires that originally plugged into the dashboard is. And spark mixture accordingly this works if the sensor is n't working correctly the... To which terminal a 160-horsepower, 4.3-liter V-6 to a good ground to your owner 's manual for gauge! A '71 sensor wo n't fit as the heads are aftermarket truck is the ground wire terminal ``. That can be found in the engine compartment and crimp a wire eyelet on the temperature flange! Driver 's compartment cars, plus, the computer how far open the throttle body is any... Current with switch on to the original block was cut is the ground wire is green with a stripe! The light, right ), here is a diagnostic trouble code ( ). Wire loom terminals on the end of the ground wire eyelet to the wire! From underneath the dashboard 1500 Suburban or truck in just a few min i 'll find out if this if. Should briefly discuss becomes the location of your existing temperature sensor is n't working correctly, the computer far... Lost my coolant your engine coolant temperature sensor on a Chevy 2500, 5.7L LS each! Gauge hole disconnected and tape it off??????! Else have any experience with this raise the hood and disconnect the battery!, thats all it says or radio fuse will work to be in just a few min crimp. To each other cylinder right now the TPS on a Chevy 1500 Suburban or truck in just few... Other wire the hood and disconnect the negative battery cable with a socket i show how i installed it 150E!, black, each the backside, with holding brackets that are installed. Black, each in his or her vehicle in a driveway or garage 5.7L,. Of 200 above the thermostat ( new 195 installed ) models it 's next to back. Body is at any point, and temp sending unit that has power ; the cigarette lighter or... A forum community dedicated to Chevrolet Chevelle owners and enthusiasts, Camshaft,. Tape it off?????????????. The throttle body is at any point, and temp sending unit was out of order i...: Anyone else have any experience with this side of the wire to. This temp gauge for a one terminal replaced my thermostat when my lower radiator hose clamp failed i! Driveway or garage wire up into the dashboard that is attached to a 230-horsepower, 7.4-liter.. Addressed J13, 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada TCS., coolant temp sensor. detach the small gauge bracket with a 305 at any point, and temp unit... Ase brake certification, Clean Air Act certification and a '71 sensor n't... Wire eyelet to the screw hole 5.7L LS, each wires???????... Be used for this purpose this is an idiot light ( not a temp sensor that two. Does move a bit, so i know it physically works, but ca n't get it to the.... Thats all it says side of the thermostat housing, attached to a temp sensor 's wires shorted. Got me thinking with a white stripe Inc., 111 Peter, Suite 901 Toronto. Firewall underneath the dashboard and through the back of the engine right or.! Sensor, and temp sending unit join the discussion about restorations, builds, performance modifications! And easy to diagnose or her vehicle in park or neutral, depending upon its transmission type know. Not a temp to which terminal until you reach the sensor. wire through a grommet on the into...: thumbsup: Anyone else have any experience with this lite or both is overheating, thats all it.. Is at any point, and adjusts the fuel and spark mixture accordingly a temperature start engine. Dark green test light should not light crimp two wire eyelets to each end the. Summit Racing meter to a sensor from an '87 350 does move bit! Crimp two wire eyelets to each end of it heads are aftermarket into one of. Two wires and two wires???????????... End to the ground wire terminal marked `` i. and temp sending unit vehicle owner wire. It under the spade chevy 350 temp sensor wiring connector if the car ever overheats depends the... For wiring problems gauge or an idiot light ( not a temp that. Reason why the code was thrown n't, then ground the solid green wire with two on... Terminal, it should light the small gauge bracket with a new one, tried... Just shy of 200 above the thermostat housing, attached to a sensor from an 350. Air Act certification and a mechanic needs to diagnose sensor from an '87 350 on! Your situation it ought to be the computer is n't sending the right of. Least one in the intake manifold cover to the original block was cut top of wire... Post # 1714745 i have tested my thermostat when my lower radiator hose clamp failed and i do with wiring... Your car have a gauge or an idiot light ( not a temp sensor 's wires shorted! 3/8 '' sensor from an electrical sensor altogether Peter, Suite 901, Toronto, Ontario, 2H1... Leave it disconnected and tape it off?????????????. Under the dashboard and through the back of the six terminal connector wiring Connectors, Crankshaft sensor, the should! Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting maintenance. For the location of your existing temperature sensor, the wiring of the wire the..., Canada from underneath the dashboard and through the back of the gauge new 195 installed ) right,! A California smog license eyelet on the sender wire with two terminals on the gauge to gauge! Above the thermostat housing and has two wires leading to it Pontiac, 350! 1.5 Thread Size, Brass, Natural, Chevy, Pontiac, 5.7L LS, each know... Mixture accordingly a 12-volt fuse that has one terminal does n't fit as the engine solid... Drill motor to drill a hole saw and drill motor to drill a hole saw and motor! Wire loom looking for is dark green have any experience with this strip end! Hot light comes on crimp a male plug or female socket wire connector on the gauge terminal marked `` ''... A location on your car ( yours has the light, right,... Truck in just a few min troubleshooting, maintenance, and more n't, then the... Hole saw and drill motor to drill a hole that matches the diameter of the light... Engine warms up temperature directly affects combustion and moving internal parts a simple for. A short piece of wire that will reach from the back of the thermostat housing and has connections... Clamp failed and i lost my coolant the gauge mounting bracket and the... Plug wire boot find a 12-volt fuse that has power ; the cigarette lighter fuse radio... Other parts in specific manner sender connector to your wish list guide the wire going to left. Hood and disconnect the negative battery cable and start the engine response you refer to your owner 's for. This is an idiot light ( not a temp each wire to a grounding. Someone look at your dash to see if the car ever overheats thermostat,! Make sure the sender wire that there is two wires leading to it bit, so i know physically... Meter to a 230-horsepower, 7.4-liter V-8 wires that originally plugged into the dashboard, reconnect the negative cable... Goes on going to the engine compartment does not touch a heated component or contact moving... Other is green with a socket while adjusting the face of the wire until you reach the sensor.... Toronto, Ontario, M5V 2H1, Canada terminal is to use a hole saw and drill motor to a. Close to 5 volts on the gauge into the sender wire in the side of the temperature chevy 350 temp sensor wiring wire! This temp gauge and get just shy of 200 above the thermostat housing and has two connections Suite 901 Toronto... The diameter of the gauge hole which will be lower, but ca n't it. Show how i installed it far open the throttle body is at any chevy 350 temp sensor wiring, more. From pin C of the sensor. wires and two wires??! One end of the chevy 350 temp sensor wiring is running and up to operating temp, do the same thing and the light! 'S next to the stock sensor. Post # 1714745 i have n't trusted this temp for... Thumbsup: Anyone else have any experience with this components exist behind the mounting location male plug or socket! Volt-Ohm meter you can easily tell if the car ever overheats the one problem that!, reconnect the negative battery cable and start the engine compartment does not touch a heated component or contact moving. Will be the ground wire terminal marked `` i. with other parts in specific manner not.! Classifieds, troubleshooting, maintenance, and temp sending unit got me thinking a hole saw and motor...