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Instrument cluster electrical problems Posted by Rod [Email] ![]() ![]() |
My wife's 98 9kCSE has an intermittent electrical problem in the instrument cluster. Every so often the gas and temperature gauges will drop to zero and the low fuel light will come on. Usually it's just for a few seconds, but occasionally it can be several minutes - in which case, a hefty slap on the dash top sometimes brings it back to life.
Looking at the wiring diagram for the instrument cluster (link below), it appears that there is a common wire ("B2") for these two gauges so I figured this was the problem. I cleaned up the connectors, spraying liberally with switch cleaner, concentrating on the "B2" green and white wire. Put it all back together but it doesn't seem to be any better.
I don't see any obvious problems behind the dash. The grounds look OK (and a bad ground should affect more than just two gauges). Could it be something internal to the instrument cluster, or is a bad connection still the most likely culprit?
Instrument Cluster Wiring Diagram
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