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Old 09-09-2012, 01:16 PM   #1
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engine temperature guage

I have a 94 winnebago warrior with 454 motor. I can't get the temp guage to work. Checked wires at sending unit switch (black & white wire), it's ok. Traced the wires to the plug at the cluster where it plugs in at dash. When you wiggle it the gas guage will fluctuate, but temp guage doesn't. I tried a ty-wrap at wire harness where the plug cluster is, thinking the weight of the wire harness was pulling away from connections. Previous owner said the guage was working.Any help would be appreciated.
Thanks Herb
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Old 09-09-2012, 02:05 PM   #2
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Typically, one connector of the dash gauge is connected to battery. The other connector is connected to the plug cluster, then to the sending unit which has a case that is connected to frame ground.

So, can you disconnect the connector on the dash gauge that runs to the sending unit? And measure the resistance from that wire to ground? It should be less then 200 ohms.

Also, using a digital meter, measure the dash gauge.
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Old 09-14-2012, 07:41 PM   #3
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Thanks Jim for your reply. I haven't had time to get back to it but when I do and follow your advise I will let you know how I make out.
Thanks again...Herb
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Old 09-15-2012, 06:28 AM   #4
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I found the GM instrument coolant gauge to be inaccurate. I had one go bad in our 1995 Safari Trek with GM 6.5 Diesel, bought an aftermarket gauge and sending unit and it read about 20 degrees hotter than the original gauge. I found the same discrepancy after adding a Scangage to our 1999 Trek with 454 gas engine.

Quote:
Originally Posted by molly1 View Post
I have a 94 winnebago warrior with 454 motor. I can't get the temp guage to work. Checked wires at sending unit switch (black & white wire), it's ok. Traced the wires to the plug at the cluster where it plugs in at dash. When you wiggle it the gas guage will fluctuate, but temp guage doesn't. I tried a ty-wrap at wire harness where the plug cluster is, thinking the weight of the wire harness was pulling away from connections. Previous owner said the guage was working.Any help would be appreciated.
Thanks Herb
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Old 09-15-2012, 06:38 AM   #5
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Maybe it's the sending unit, did you change it. Jim
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