As Tim has mentioned....make sure you have the proper temp sender.
Another problem I have observed with the 1500's is if sensor (when
installed) does not have a really good ground, it may not work properly.
Dan Zubkoff
San Mateo, CA
>From: T and E Corcoran <corcoran@bainbridgeisland.net>
>Reply-To: T and E Corcoran <corcoran@bainbridgeisland.net>
>To: "The Blair's" <jblair@rcsis.com>
>CC: Roadster List <datsun-roadsters@autox.team.net>
>Subject: Re:1500 temp sender
>Date: Tue, 17 Oct 2000 21:53:02 -0700
>
>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
>
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