E-fans, Diablo, And Nelson

[ryaleon]

Originally Posted by [__--MUD--__]

Did you tap into the wire for the compressor clutch? There will be 12 volts on that line when the ac is running.

The Nelson harness instructions online said to do it like that. But the instructions i received said to wire the green wire into pin 33 instead. I called them to see which set of instructions were the correct ones, they advised the pin 33 ones were.

Which wire is for the compressor clutch? I know it's a green wire but not sure which green or where it's at. Also have read that it's a lime green wire. I have a really hard time distinguishing greens and yellows and oranges so hope its not a green.

[[__--MUD--__]]

Look at the compressor clutch... There are only a few wires running to it.

It should be Dark Green / White

I dont know what they are directing you to do, but pin 43 off C2 is the compressor. Pin 33 isn't even used.

[ryaleon]

Alright I'll go look for clutch wire. so dark green with a white stripe? They claim blue pin 42 is low speed and pin green 33 is high speed/ac pressure sensor.

[[__--MUD--__]]

Easy to verify- Jab a 12V test light at the compressor end, turn the ac on/off. Light should follow your switching. Hit pin 43, should do the same.

The line on the compressor side should be solid dark green. On the PCM side it should be dark green & white.

[[__--MUD--__]]

Full pinout-

http://www.lt1swap.com/2004vortec_pcm.htm

[ryaleon]

Originally Posted by [__--MUD--__]

Full pinout-

http://www.lt1swap.com/2004vortec_pcm.htm

Thanks for that I have it bookmarked now. So green 43 is the pin to use then.

[[__--MUD--__]]

****, I bet you need to have the pcm programmed for it to work as they directed you for it to control the fans.

big thread here-
http://www.performancetrucks.net/for...-432250/page4/

[ryaleon]

It is programmed with the diablo tuner. But it wont activate the fans when the ac is turned on. Only when coolant gets up to a certain temperature. I don't think diablo has the ability to tune it the way it needs to be. Only options are fan1 and fan2 temps.

[ryaleon]

on the pcm side it will be in the large loom correct?