The fuse that controls the gas gauge,alternator and speedometer on my 1991 chevrolet c3500 motorhome blew out twice in a row.What could be shorting out.
The guy I bought it from drove it to my home (about 45 miles)after the fuse blew the first time.He said it did not affect the driving. My husband replaced the fuse and the gauges worked again. The next time he started the engine,the fuse blew again.
Where do we locate the problem
this is a tough one and probably is electrical. GM had some issues with the instrument clusters and usually the need to be rebuilt because of a short in the system. Bummer that you're having problems- hope this helps!
Judy and the Curry's Team
〉 Answered on Jul 27th, 2011 by Judy Curry, Co-Founder and Vice President of Marketing at Currys Auto Service
Foremost, the alternator isn't a fused circuit, but the voltmeter is. And it is part of the dash gauge cluster, which is what it seems like you are describing. Trial and error is probably the best approach to isolate the culprit. Start out by unplugging the dash cluster multigang connector and see if the fuse blows. If it does, there is a short somewhere between the fuse panel and the dash connector. If unplugging the connector stops the fuse from blowing, the dash cluster is shorted internally. Another approach, which is not recommended, is to install a much larger fuse and then wait to see where the smoke comes out to know where the short is. But we don�t recommend that approach unless you like to risk starting an electrical fire!
〉 Answered on Jul 27th, 2011 by Kerri Papajohn, Marketing Director at USA Sealants, Inc.