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Old 06-18-2014, 07:23 AM   #1 (permalink)
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Lq4 alternator

I posted this in electrical but I'm thinking I will have more luck here. Does anyone run a modified harness for a 6.0(lq4 or lq9) and the stock alternator? If so how did you wire it?
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Old 06-18-2014, 08:01 AM   #2 (permalink)
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The field wire is powered by the PCM from the factory. PCM connector C2 (red 99-02, green 03-07), pin 15. I retained that circuit when I modded my harness, and then connected the 12 volt post to the battery with an 8 gauge wire.
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Old 06-18-2014, 08:13 AM   #3 (permalink)
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Quote:
Originally Posted by chris demartini View Post
The field wire is powered by the PCM from the factory. PCM connector C2 (red 99-02, green 03-07), pin 15. I retained that circuit when I modded my harness, and then connected the 12 volt post to the battery with an 8 gauge wire.
Perfect. When my harness was modified he kept the plug for the alternator on it. So all I have to do is connect the alt to the starter if I understood you correctly.
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Old 06-18-2014, 08:19 AM   #4 (permalink)
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Quote:
Originally Posted by GdmZ28 View Post
Perfect. When my harness was modified he kept the plug for the alternator on it. So all I have to do is connect the alt to the starter if I understood you correctly.
Probably so.
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