I'm modifying an lq4 harness to handle ls3 injectors. I got these injector connectors, but which wire is for signal and which one for +12v?

 

Bump.

 

Isnt the injector labeled (+) and (-) somewhere?

 

No. Any ideas?

 

Pink is 12V, the dark green/black is ground. The LQ4 harness the topmost wire looks to be a faded pink wire, so that's 12V and the white is ground.

What's the LQ4 harness off of? I looked at a couple LQ4 diagrams and can't see any with white ground wires for the injectors.

 

Pin #2 is the control from PCM, Pin #1 power

 

The lq4 connector is on the left. On the right is an ls3 connector I got on eBay. The color of the ls3 may not be accurate. Which is pin 1?

 

They should be numbered. Look at the top by the wires it should be numbered. I just bought the same connectors you did but have not started wiring yet. If need be I can run out the the garage and look at mine.

 

Ok all the white ones are power and the multi colored ones are pcm.

 

I see an "A" and a "B". No 1 or 2 anywhere.

 

Great! Thanks!

 

A=1 b=2