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Alternator Dummy light wiring

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Old Nov 13, 2013 | 11:20 AM
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Default Alternator Dummy light wiring

Finished the swap and never really worried about it hooking it up. Now that I'm bored I wanted to get some of the minor things finished.

I'm running an Fbody/Camaro alternator that has 2 wires
-Red
-Blue with brown trace

My harness is now all taped and loomed, so I can't trace them, but I'm assuming the red is the exciter wire.

Anyone know where the blue wire goes?

Alternator charges fine, just wanting to hook up the stock Volvo dummy light.
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Old Nov 13, 2013 | 11:23 AM
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Edit, this is a reworked truck harness with an fbody alternator plug.

Red is gray on the connector
Blue/black trace is brown on the connector.

Both wires go into the PCM, so how do I work the dummy light into it?


Last edited by onetype; Nov 13, 2013 at 11:40 AM.
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Old Nov 13, 2013 | 05:25 PM
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Anyone?
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Old Nov 14, 2013 | 10:41 AM
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Still hoping for some clarification on this. I think my issue is that I'm running a truck harness with an Fbody PCM. Both alternator wires going into the PCM. Haven't had any issues in almost a year, just want to get the dummy light working again.
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Old Nov 14, 2013 | 11:19 AM
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My LS1's (a 99 and 02) harness and PCM only has a one wire connecting to the Alternator. 2nd terminal on the connector plug with a Red wire.

I have seen other question how to get the idiot light working, but have not seen any good solution.

BC
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Old Nov 14, 2013 | 12:01 PM
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Originally Posted by bczee
My LS1's (a 99 and 02) harness and PCM only has a one wire connecting to the Alternator. 2nd terminal on the connector plug with a Red wire.

I have seen other question how to get the idiot light working, but have not seen any good solution.

BC
From what I read the Fbody/Camaro's from the factory do not get excited from the PCM, whereas the truck alternators do. Probably going to cause my alternator to take a dump prematurely, but It has a lifetime warranty through Autozone.

Just trying to get as many factory dash lights working as possible now.
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