Tachometer Failure - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-12-2008, 01:22 PM   #1
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Default Tachometer Failure

I am currently having problems with my tach not working intermittently. It will work when I fire the car up but during driving it will sometimes just stops working. Everynow and then it will randomly start to work too.

I am guessing the sensor is bad because I don't think there is a cable. But i do not know where this sensor is located.

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1994 SSEi, CAI, TR 55'*, JL subwoofer, rebuilt transmission, 185,000
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Old 02-12-2008, 01:53 PM   #2
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Check your ICM connection first. The white wire is for tach only. Then check your firewall connection, then lastly pull the gages out and check for anything broken or damaged.
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Old 02-12-2008, 08:09 PM   #3
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ICM? Where is this located???
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Old 02-12-2008, 09:16 PM   #4
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It'* the plate that controls your coils. Take a look at the plug that it connects to.
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Old 02-13-2008, 09:07 AM   #5
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If any other guages ever act funny, you could have bad connections in the gauge terminals which is a common problem.

http://www.bonnevilleclub.com/forum/...e=article&k=93
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Old 02-13-2008, 01:48 PM   #6
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Which I do... My Driver information center shorts out all of the time! I guess I will check the ICM first and proceed with tearing the dash apart and cleaning the connectors.

Thanks Guys.

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1994 SSEi, CAI, TR 55'*, JL subwoofer, rebuilt trans, 184,000
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