Re: {Chrysler 300} 64 temp sending units

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On Jun 25, 2026, at 13:09, 'dave mason' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Run a ground jumper from the “S” terminal on fuel gauge (or, ground the wire at temp sender end) for a few seconds only and you should see your temp gauge go up, provided the gauge is good and it’s getting 5.5V from the fuel gauge limiter (output on fuel gauge labeled “A” with the copper strap you mentioned).

Many times the 5-pin connector on back of instrument cluster gets loose or pins are tarnished, not saying this is your case, just info for the archive if someone looks this thread up.

Recently had an old temp sender go bad, first time I’ve ever seen that happen. Replaced sender (just a variable resistor) with one from Napa and problem solved.

D&K

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On Jun 25, 2026, at 11:31, David Dumais <ddume300@xxxxxxxxx> wrote:

I have 3 sending units that thread into

W/pump housing.

No China or US stamped on any.

1 is stamped 250 with KS j3,

Another has no stampings.

And one has KS B4 and 250 all stamped

Twice .

All stamping are on hex faces .

Any thoughts on correct unit for the 64

Application?

Also, the voltage regulator stud has the copper ribbon squeezed tightly to it

I have to remove cluster again to verify

It.

I used the 12 volt needle test light between sending unit and the plug on end of violet gauge wire.

It flashed intermittently and not a steady light signal

NOS temp gauge not registering yet.

All pins and board copper have been gently cleaned.

Any thoughts?

Thanks

Dave D

Thanks Dave

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