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Old 04-14-2009, 10:36 PM   #1 (permalink)
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Default 95 Mustang Water Temp Gauge Not Working

I have a 95 Mustang GT. The water temp gauge stopped working on it last fall before I put it away for the season. Well now I need to get that working.I replaced the sending unit and still does not work. So I took the cluster out. The wire from the sending unit checked out ok. So then I check and the ground wire is fine as is the hot wire. Then checked out the printed circuit board and it is fine. So I am donw to the gauge itself or there is a small circuit board that snaps into the gauge cluster on the bottom. Anyone know how to check out either of these to find out what one is bad?
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Old 04-15-2009, 12:57 AM   #2 (permalink)
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Default Re: 95 Mustang Water Temp Gauge Not Working

The circuit board that snaps in is the anti-slosh module for the fuel gauge and has nothing to do with the temp gauge operation.

The best way to test the circuit is to use a variable resistor - one side to ground, the other side to the sending unit wire, test 9.7 ohms at the hot mark, 74 ohms at the cold mark.
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Old 04-15-2009, 03:49 PM   #3 (permalink)
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Default Re: 95 Mustang Water Temp Gauge Not Working

This may be completely wrong, as I've never messed with a '95. However, I have a 5.0 in my '89 and a stroked 5.0 in my '65 and both of them have 2 coolant temperature sensors. One runs the gauge. One tells the computer what's going on.

If a '95 is the same...You replaced the right one? Right?

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Old 04-15-2009, 10:43 PM   #4 (permalink)
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Phil yes I replaced the right one. Today I checked out everything again. Well everything but the gauge itself. I could not find a variable resistor in town to check it. So I am going to just try to find a different gauge and try it. Worst part is the gauge is longer sold by Ford so it looks like I buy used.
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