It reads normal for about 15 to 20 min. It’s also cheap and easy to diagnose. Does your car have a gauge or an idiot lite or both? This can be any solid piece of metal. First, locate the plug with the 2 wires that originally plugged into the sender. Connect the black lead of the digital ohm meter to a solid grounding. There is a pipe plug in each head and at least one in the intake manifold that can be used for this purpose. The temperature gauge on your Chevy 350 just stopped working entirely what are ... check the power to gauge and the temperature sensor (tps). His automotive vocation has spanned more than 35 years and he authored the auto repair manual "Auto Repair Shams and Scams" in 1990. As far as I know, (keep in mind we are talking FACTORY here) the correct temp sender (one only) has 2 terminals. Twist one end of the wire and place it under the spade fuse connector. 350 has a temp sensor that has one terminal. Tom- what don't you know???? 350 has a temp sensor that has one terminal. Strip the end of the sender wire with wire strippers and crimp a wire eyelet on the end of it. Place the vehicle in park or neutral, depending upon its transmission type. Coolant temp sensor is bad. PM me for more information. Testing the coolant temperature sensor is a very quick process. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. I have tested my thermostat, coolant temp sensor, and temp sending unit. Locate your fuse box inside the passenger cabin. Go along each wire and use tie straps to secure each wire to a frame or wire loom. There are two sensors or sending units at the front of the engine. 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 put the 1st wire to ground and the red light goes on. 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. 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 … A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. 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. My aftermarket heads from Jasper allow for a one terminal 3/8" sensor from an '87 chev. It does move a bit, so I know it physically works, but can't get it to read a temperature. Start and let the engine run. TOO EASY. 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. The wire you're looking for is dark green. 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. Set the emergency brake. Get a short piece of wire for a jumper. with a 7.4 engine. I was told by Jasper to use a sensor from an '87 350. At location J13, circuit 150E is the ground wire from pin C of the servo connector. gauge). 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. 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