v8bug

I am wiring up my megasquirt to do fuel only and I am using the stock injector pigtails. This is off a 2003 5.3l

I need to know which is the negative and which is the positive side of the injector. All of the injectors have a pink wire, and the other wire is different for each injector. I done know how gm triggered them. Maybe the pinks are all grounded and they trigger off the positive?

any help would be great!!

Old Geezer

iTrader: (3)

The injectors are fired, by taking the neg side to ground. The pink should be hot, and the varied color wires are negative.

v8bug

thanks!!

hopefully I will have it running in no time!!