Hear me out-
Previous alternator (2006 4.0) would charge, but with all the accessories on resulted in the ‘check gauges’ lamp to come on until I gave it some RPMs. I had ordered a new PCM On order from Wranglerfix but decided to go ahead and order a new alternator as well (the one in the TJ was a reman of unknown origin).
New PCM comes, install takes 5 minutes, trans issue fixed. But old alternator still won’t handle load. New alternator comes, instant 14.8 volts charging. Problem is, it’s around 14.8 all the time, took the TJ on a 2 hour drive, still hitting 14.8. Battery is showing 12.8 volts sitting. Swapped old PCM back in- same action; 14.8 volts all the time unless I disconnect the trigger wire from the PCM.
is this indicative of a bad new alternator (sadly I don’t have the old one to try with the new PCM)? Is there a way without sophisticated meters (I have your basic cheap voltmeter) to test the trigger wire? FYI I have cleaned engine grounds as well as contact points on alternator bracket.
Your ideas are appreciated. I don’t want to destroy the battery.
Previous alternator (2006 4.0) would charge, but with all the accessories on resulted in the ‘check gauges’ lamp to come on until I gave it some RPMs. I had ordered a new PCM On order from Wranglerfix but decided to go ahead and order a new alternator as well (the one in the TJ was a reman of unknown origin).
New PCM comes, install takes 5 minutes, trans issue fixed. But old alternator still won’t handle load. New alternator comes, instant 14.8 volts charging. Problem is, it’s around 14.8 all the time, took the TJ on a 2 hour drive, still hitting 14.8. Battery is showing 12.8 volts sitting. Swapped old PCM back in- same action; 14.8 volts all the time unless I disconnect the trigger wire from the PCM.
is this indicative of a bad new alternator (sadly I don’t have the old one to try with the new PCM)? Is there a way without sophisticated meters (I have your basic cheap voltmeter) to test the trigger wire? FYI I have cleaned engine grounds as well as contact points on alternator bracket.
Your ideas are appreciated. I don’t want to destroy the battery.