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Old 09-07-2007, 09:33 AM
Brian Carlton Brian Carlton is offline
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Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by gmcop1 View Post
I have the same problem with my '80 SD that I just purchased. The fuses seem OK. Looking at the electrical schematic it seem that the power for theses items originates in the ignition switch and then goes to the fuse box. Could it be the switch?
Gary
If you have any suspicion that the fuse is the issue, you must replace the fuse. Looking at the fuse and determining that they "seem OK" is not sufficient. The failure mode for most of these fuses is a very tiny crack across the element........not visible. Sometimes, the fuse will fall apart when you remove it from the holder.

Replacing all the fuses is a wise move for anyone with an older vehicle that has questionable maintenance in the past (90% of them).
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