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-   -   Need help with OEM Fan wiring harness (https://www.performancetrucks.net/forums/tuning-diagnostics-electronics-wiring-161/need-help-oem-fan-wiring-harness-543815/)

Wolftrk99 05-02-2016 05:18 PM

Refer to diagram above.... c1 pin 42 green wire, c2 pin 33 blue wire

Wolftrk99 05-02-2016 05:19 PM

Iirc your auto recirc will cureently be connected to pin 33 on connector 2 remove the wire and insert the fan wire and let your tuner know you did so....

2xLS1 05-02-2016 06:50 PM

The green wire will always go to the blue connector 42 and the blue wire will go to the red (99-02) or green (03-07 classic) connector 33. In the pic I posted the wires were cut before the factory 2 wire connector between them and the pcm. I just extended those wires with enough length to reach the pcm connectors and added female pcm terminals on them.

Wolftrk99 05-02-2016 08:18 PM

There was a how to i had seen somewhere that tapped into the ac clutch at the fuse box and ran another relay but just seemed like a lot of extra crap, especially when youre adding another point for a failure and drawing current from the compressor clutch circuit...

Jojoman01 05-02-2016 08:33 PM


Originally Posted by 2xLS1 (Post 5358174)
The green wire will always go to the blue connector 42 and the blue wire will go to the red (99-02) or green (03-07 classic) connector 33. In the pic I posted the wires were cut before the factory 2 wire connector between them and the pcm. I just extended those wires with enough length to reach the pcm connectors and added female pcm terminals on them.

So I think I got this down green gets put in pin 42 in the (blue plug) the blue wire gets put in pin 33 in the (red plug). Never heard ofrom anyone tapping in to the red plug but if it works
https://cimg3.ibsrv.net/gimg/www.per...cfb076661d.jpg

As shown green wire pin 42 in blue plug<br/>Blue wire in pin 33 in red plug. <br/>And were i got purple are those two black wires supposed to be met up wit another wire to be grounded off?


https://cimg3.ibsrv.net/gimg/www.per...90e013b368.jpg

Like the way urs is 2xLS1. That the only one i havent got to yet? Thanks alot for ur info

Wolftrk99 05-02-2016 08:37 PM

The red and green or blue plugs are the pcm connectors yours should be red and blue

Wolftrk99 05-02-2016 08:45 PM

Wish i had taken better pics when i did mine now....

Jojoman01 05-02-2016 10:49 PM


Originally Posted by Wolftrk99 (Post 5358196)
The red and green or blue plugs are the pcm connectors yours should be red and blue

I know bout the plugs I'm asking about the black wire I'm trying to see if his is tied up like I said with the purple paint I used. Do u have any pics at all

Wolftrk99 05-03-2016 08:00 AM

Yes the two black wires are ground... I cant find the ones i have but if it ever stops f'n raining i can get some....

Luis3701 05-03-2016 11:25 AM

what would i need to make the 08 oem fans work on a 2000 ?


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