Anybody have any thoughts... what else other than a bad voltage regulator can cause an overcharge situation on a '93 Toyota truck, 22re? My brother picked up a new project and I'm trying to nail down this one major issue... The volt gauge is pegged all the way right at anything over idle, and the charge park lights come on when the RPM's are anywhere above idle. The PO put a new alternator on recently, and also just recently put a brand new battery in (sticker says 1/08). He also re-did the battery cables, I'm assuming to try to troubleshoot this same problem. Unfortunately, I think the overcharging alternator has killed the battery.
I have not taken the alternator out to have it tested. That will be the next step tomorrow night.
I have checked/fixed/cleaned every ground. The battery to block ground was the only one that was good. The battery to body ground was a piece of speaker wire from the negative terminal to one of the bolts that holds the plastic fuse box to the fender, the ground that comes out of the alternator harness was hanging loose not connected to anything, and the head to body ground was three pieces of corroded wire makeshift repaired with the "twist and cover in electrical tape" method.
Any other possibilities before I take the alt. out tomorrow night? This is a 93, so it's internally regulated. I checked the plug on the alternator itself and all is good and clean there. Could the condition of the grounds previously be a possible cause of damage to the internal regulator on the alt, causing it to basically burn out and overcharge, even though I've fixed all the grounds?
I guess it's possible that it was a dud from the start... it is an "autozone special" replacement alt.
I have not taken the alternator out to have it tested. That will be the next step tomorrow night.
I have checked/fixed/cleaned every ground. The battery to block ground was the only one that was good. The battery to body ground was a piece of speaker wire from the negative terminal to one of the bolts that holds the plastic fuse box to the fender, the ground that comes out of the alternator harness was hanging loose not connected to anything, and the head to body ground was three pieces of corroded wire makeshift repaired with the "twist and cover in electrical tape" method.
Any other possibilities before I take the alt. out tomorrow night? This is a 93, so it's internally regulated. I checked the plug on the alternator itself and all is good and clean there. Could the condition of the grounds previously be a possible cause of damage to the internal regulator on the alt, causing it to basically burn out and overcharge, even though I've fixed all the grounds?
I guess it's possible that it was a dud from the start... it is an "autozone special" replacement alt.
