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Modified Tech Discussion Forum for Tech related discussion for Modified XJ's and MJ's.

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Old March 25th, 2015, 08:43
NAXJA Forum User
Join Date: Mar 2003
Location: Arvada, CO
Posts: 256
LED Alternator Light with PCM Controlled Alternator???

I hope someone can help he out here..... I am building a custom steel / Aluminum dash with all aftermarket gauges and lights. I thought I had the Alternator light all set in my head, then I came across something I didn't expect. I thought I would hook up the traditional LED light and resistor the field side of the alternator, then I found that these alternators are PCM controlled.

Does anyone know if a typical charge indicator light would work on the alternator? Or, if there is a different way to hook it up?

XJ is what's left of a 2001. Alternator is a relocated 2001 136A WJ 4.0L alternator, but same hook up to XJ PCM. There are so many things in progress (torn apart) on the jeep right now that I cant start it up and test wires right now, so I'm hoping a Jeep wiring guru can chime in.


Since everyone loves pictures, here's one of the in progress dash (1/2" LED indicators are now under each of the gauges)...

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