December 8, 200916 yr Hey guys. My 1990 4wd Loyale Wagon is acting a little funny. The voltage meter seems to change with the RPMs while driving. It usually sits somewhere near 13/14 but at times when say I down shift from 4th to 3rd and the RPMs climb high the voltage can spike to nearly 18! The headlights will also become a lot brighter and then get steadily dimmer as I shift back to 4th, 5th, etc. A few things seem to effect the voltage and reflect in headlight brightness quite a bit. If I turn the heater to even the 2nd setting they dim again. Please let me know!
December 8, 200916 yr you answered your own question. replace the alternator, and soon before you fry your battery and you'll need another one of those too. voltage regulator is built into the alternators on those 'roos. -Justin
December 8, 200916 yr yep regulator is going out, good time to do a GM alternator swap. there alot cheaper and last longer
December 10, 200916 yr Is there anything involved with that? Or is it a direct match? See if that helps: http://www.ultimatesubaru.org/forum/showthread.php?t=100559 Edited December 10, 200916 yr by somick
December 12, 200916 yr Author Well, ended up just finding a stock replacement from the wrecker for $30. Swapped it in tonight and everything is running perfect now. Voltage sits right where it should and doesn't change with RPM's. Even feels like it has a bit more pep when driving it. The old wires looked melted/corroded and covered with a whitish goo. All is well now though!!
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