Isuzu Other Repair Question
1993 Isuzu Trooper 4WD, 3.2L V-6.
New battery, 2nd new Alternator.
First Alt. from local independant dealer "burned out" immediatly. Second Alt. from AutoZone, checked out good before and after installing, but still not charging. Incidentally, the alternator that was on the car when the problem noticed checked out good, but opted to keep new Alt.(friend purchased car from a used car lot, drove approximately 3 hours, car died/ battery dead). Now when first start engine and release key, amps low on gauge, then a half second or so spike to around 14 amps, then down to 12 and under, and discharging. I've traced wires with no apparent shorts found, and keep trading out batteries so as to not completely drain his new one or my heavy duty one.
Can it be no 12 volt preload on the regulator, and how can I check it? Can I use a temporary jump wire from battery to Alt. wire to check? Can it be the Ign. switch? Or do I have to reset computer codes?
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