Saturn L-Series:

Instrument gauges

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#1 3/24/2010 5:11 PM

slt
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Registered: 3/24/2010
Posts: 1

Instrument gauges

I have a 2000 Saturn LS1 Driving down the road all instrument gauges stop working. I pulled over and switched car off and restart car they went back to working could this be a grounding problem?

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#2 3/24/2010 5:57 PM

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Registered: 9/27/2008
Posts: 1279

Re: Instrument gauges

The gauges are controlled by a serial data circuit which feeds information to the instrument cluster. Not so simple, like in the past.

The correct procedure is to install a scan tool and check for trouble codes in the Powertrain Control Module and the Body Control Module memory. Often times a trouble code will lead you in the right direction of the fault, which may require further diagnostics with a digital volt/ohm meter.

Possible causes can be a lot of things, and I don't see any related technical service bulletins. It could be a poor ground or power feed to the cluster, a bad connection in the serial data line, and so on.

If I had to guess, it might be the cluster itself (internal problem requiring replacement) or a poor terminal connection at the cluster connector. You might try banging on the dash a few times with the ignition on. If the gauges shutdown or jump around on impact, it's probably the cluster or cluster connection.

The cluster terminal should be checked by inserting a correct male terminal into the female terminal to be sure there's a notable drag going in and out -- loose is no-good.

If it only did it once, I'd wait until it happens again before investing any time and money.


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