Quote:
Originally Posted by 70STOVEBOLT
Could this be why my ammeter is always showing discharge, even though it is charging? That would be odd since I changed the underdash harness, the underhood harness, and the entire gauge cluster. I had the problem before changing all of those, and still have the problem.
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How is your alternator output wire configured?
As I mentioned in an earlier reply, if the alternator output is routed directly to the battery (instead of the stock junction point), the charging current will bypass the ammeter shunt and not register on the meter. But current flowing from the alternator / battery to the rest of the truck's electrical system will be flowing through that wire that serves as the ammeter shunt. And that will cause it to indicate discharge all the time.