Re: [Amc-list] Re; Temp Sending Unit

["Ross Guistino" <rossg@xxxxxxxxx>]

Thanks.  I do have a TSM for the 73 Gremlin so I pursue the electrical
diagram route.

Ross

On Sat, March 24, 2007 9:34 pm, John Elle wrote:
> Ross
>
> Snip
> I've got a '73 Gremlin with a 304 that has a non-functioning temp.
> guage.
> I have replaced the temp sending unit and cleaned the contacts in the
> wire
> leading from the unit to the firewall.  What else can I do to test or
> repair the guage?
> Snip
>
> Snip
> The regulated voltage is supplied by the gas gauge it etc etc etc.
> Snip
>
> Snip
> Yes, the gas guage works fine.  So that tells me that there is a break
> in
> the wire from the temp sending unit to the guage, correct?
> Snip
>
> Not really but maybe. I did not go to the web page in question to read
> it, but using a volt meter to measure the voltage available at the
> end of the wire by the temp sending unit you should see some form of
> an intermittent voltage turning on and off, or maybe depending on the
> system a steady volts DC of something on the order of 5-6 volts. It
> does depend on the dash gauge voltage regulator and how it works.
> If you have a voltage present on the end of the wire you should be able
> to ground the wire on the engine block and the heat gauge will rise.
> That would indicate that the heat gauge is functioning or not.
> If there is no voltage at the end of the wire, then the next question
> would be is there voltage back at the gauge? That is the source of
> things but that also requires getting at the gauge and making
> measurements.
> So the problem could be at the gauge, at the dash board and it's
> connectors, at the wiring under the dash, at the wiring going through
> the fire wall or anywhere in the wiring under the hood.
>
> Wouldn't it be easier if you had a schematic or wiring diagram?
> This way you could see where you had to check out things and what was
> involved. Purchasing a service manual would sure help you out or----
> you could go to;
>
> http://www.amccf.com/
>
> Follow the directions to enter the web site and then scroll down the
> left side where it says technical and look for the wiring diagrams
> for a 1970 to 1974 Hornet/Gremlin with a V8 engine and copy them off
> or at least look at them.
>
>
>
>
>
> Wiring Harness Diagrams
>
> Wire Harness of <http://amccf.laatikko.org/tech/70wireharness_v8.jpg>
> '70-'74 Hornet/Gremlin - V8 Engine
>
> Wire Harness of <http://amccf.laatikko.org/tech/70wireharness_i6.jpg>
> '70-'74 Hornet/Gremlin - I6 Engine
>
> Wire Harness of <http://amccf.laatikko.org/tech/70wireharness_trunk.jpg>
> '70-'74 Hornet/Gremlin - Trunk
>
> Wire Harness of <http://amccf.laatikko.org/tech/70wireharness_dash.jpg>
> '70-'74 Hornet/Gremlin - Dashboard
>
> Good luck at finding and fixing your problem.
> John.
>
>
>
>
>
>
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