96 Heating issue solved-well sort of

I'll try to remember to look it up later but there are some wires going to the thermostat housing (or very nearby) that probably go to the temperature sensor. Perhaps they are damaged.

My Hayne's Manual says the Coolant Temperature Sensor is "under the throttle body" on the 4.0 V6. There's nothing about it in the index so this is what the wiring diagram says ('95, no diagram for '96): A LT GRN/RED wire goes to PIN 7 on the Control Module. The other wire is GRY/RED and it goes to pin

Meanwhile, if I find anything else....

This engine/year has two temperature senders... the temp "sensor" is for the PCM only and does have two wires... The temp "sender" is for the temperature gauge only and has one wire...

Thanks. So far I have not found a wiring diagram for the sender or gauge but it says the error code for "Coolant temperature sensor circuit open" is

From what you said I gather it's probably not the temp "sensor" that's the problem

I had to change my temp gage a while back and this is how I diagnosed the problem.... Test the temperature sender unit by disconnecting the wire from the sender and grounding the wire. Then turn ignition on and watch the temp gage. If the sender is good, the temp reading will be pegged at max. If gage does not peg, then the temp gage in the instrument cluster is probably bad. If the gage pegs, then the sender is bad.

Correction.... Disregard "If sender is good, temp reading will be maxed....." I meant if the GAGE is good, temp reading will be maxed.