Are there circuit board schematics for the LS1B pcms out there?

[bubba68ss]

I have an 02 PCM that runs the truck fine except the fuel pump pin doesn't produce any voltage (customer had to jump it with a paper clip. He gave me the PCM). Is it possible to fix this?

[DURAtotheMAX]

I have an 02 PCM that runs the truck fine except the fuel pump pin doesn't produce any voltage (customer had to jump it with a paper clip. He gave me the PCM). Is it possible to fix this?

Its a low-side-driver control.........its not going to produce any positive voltage. It pulls the pin to ground to trigger a relay.

[400ss]

Fuel Pump Pin produces Positive voltage, Fans produces ground

[DURAtotheMAX]

oooooops!!! Yep, sorry about that, I was wrong. I had Duramax schematics on the screen (which is low side driver) and glanced at them, accidentally thinking/ASSuming I had the LS1b schematic on the screen.

[400ss]

oooooops!!! Yep, sorry about that, I was wrong. I had Duramax schematics on the screen (which is low side driver) and glanced at them, accidentally thinking/ASSuming I had the LS1b schematic on the screen.

all the time im doing a stand alone harness i have to recheck this cause i always forgot if it is posi signal or ground