Joe,
The sending unit is probably the wrong one. 1600's and 2000's use a sender
that might look the same but has different characteristics. One will increase
resistance with an increase in temperature, the other will have a decrease in
resistance with an increase in temperature. Polarity has nothing to do with
it. 1500's have a unique temp sender. This can be verified by measuring the
resistance of the sender in a cup of ice water and then in hot water. I
believe you want the one that shows a decrease in resistance as temp rises.
(negative temperature coefficient). I think your wiring and gauge is ok.
Regards,
Tim C.
2 '64 1500 Fairlady's
The Blair's wrote:
> I've got a positive ground 1500. I can't seem to get the temperature gauge
> to work.
> When I bought the car, the sending unit was broken off. I checked the dash
> gauge
> by grounding the wire to the frame and the dash gauge moves from "hot" to
> "cold"
> . So I bought a new sender. Now with the new sender in the car, the gauge
> stays
> at "hot" all the time. So, I am confused.
> So here are my questions:
> Is the sender supposed to have continuity to ground when it's cold?
> If it did, the gauge would read cold. Mine has no continuity when cold.
> Is the dash gauge "rest position" when the key off supposed to be hot?
> If not, maybe my dash gauge is bad.
> Reversing the wires on the gauge has no effect.
>
> Any Ideas???
> Joe Blair
> Granite Bay, Ca
> 1964 SPL 310 #2775D
> jblair@rcsis.com
> 916-791-5009
|