Electrical/Alternator question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

miket · 01-16-2003, 10:44 PM

Hoping someone can give me a clue here...

My 71 had the original voltage regulator setup. I had a spare 10 SI internally regulated alternator (63 amp) that had gone bad. I picked up a rebuild/upgrade kit from here (http://www.alternatorparts.com/alternators_gm.htm) as well as a conversion harness from here (http://www.wiringharness.com/custommods.htm). In two hours I rebuilt my alternator and installed it along with my conversion harness.

Unfortunately, it did not get rid of my lights dimming at idle in gear and flaring on acceleration. I checked voltage at the alternator and at idle and it was putting out roughly 13 volts...if I revved the engine slightly it jumped to 13.65-14.20. I checked it at the battery and had roughly the same readings....

Any ideas?

01-16-2003, 10:44 PM	#1
miket Registered User Join Date: Jan 2003 Location: Seattle WA Posts: 1,466	Electrical/Alternator question Hoping someone can give me a clue here... My 71 had the original voltage regulator setup. I had a spare 10 SI internally regulated alternator (63 amp) that had gone bad. I picked up a rebuild/upgrade kit from here (http://www.alternatorparts.com/alternators_gm.htm) as well as a conversion harness from here (http://www.wiringharness.com/custommods.htm). In two hours I rebuilt my alternator and installed it along with my conversion harness. Unfortunately, it did not get rid of my lights dimming at idle in gear and flaring on acceleration. I checked voltage at the alternator and at idle and it was putting out roughly 13 volts...if I revved the engine slightly it jumped to 13.65-14.20. I checked it at the battery and had roughly the same readings.... Any ideas?



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