[jtwoods4]

Originally Posted by Greg Reid

Sorry, I misunderstood your original post. Thought you had an aftermarket gauge set. I can't imagine why you'd have two temperature sending units...especially two sending units wired together. I'd unplug one just to see what happens to your gauge. .

so in the picture the correct sending unit is on the left I'm going to remove the sending unit on the right what is supposed to go in that hole? and what is the single green wire 4 if its not supposed to go on to a sending unit? I am so confused I just need to hook the temperature sending unit up correctly

["QUICK-SILVER"]

Switch on the passengers side is the thermal control switch for the vacuum timing control switch.
T.C.S. system controled vacuum to the vacuum advance when the engine was cold. It was suppose to help with emissions.
Newer models used a thermal switch with the vacuum lines plugged directly into it. Got rid of the extra electrical part.
It has no effect on temperature sending unit operation.
I think the engineers that designed it with the green wire jumping from one switch to the other....was just messing with us.

Clay

[jtwoods4]

Originally Posted by "QUICK-SILVER"

Switch on the passengers side is the thermal control switch for the vacuum timing control switch.
T.C.S. system controled vacuum to the vacuum advance when the engine was cold. It was suppose to help with emissions.
Newer models used a thermal switch with the vacuum lines plugged directly into it. Got rid of the extra electrical part.
It has no effect on temperature sending unit operation.
I think the engineers that designed it with the green wire jumping from one switch to the other....was just messing with us.

Clay

great thank you so much. so in other words the TCS temperature sensor on the passenger side has nothing to do with the temperature gauge or the temperature gauge reading and I can excluded from my testing

[Greg Reid]

Originally Posted by "QUICK-SILVER"

Switch on the passengers side is the thermal control switch for the vacuum timing control switch.
T.C.S. system controled vacuum to the vacuum advance when the engine was cold. It was suppose to help with emissions.
Newer models used a thermal switch with the vacuum lines plugged directly into it. Got rid of the extra electrical part.
It has no effect on temperature sending unit operation.
I think the engineers that designed it with the green wire jumping from one switch to the other....was just messing with us.

Clay

That, I did NOT know.. The wires definitely threw me as I'd never seen that configuration before. I might have guessed if I'd seen any vacuum lines going to it but I didn't...and still don't...?
Sorry for the confusion JT...