The only 2 wires that should have been connected to make the new pump run is the grey wire(+12 volts, relay actuated) and the ground wire. The New PCM controls the original relay with the green white wire once it is undone from the old PCM and wired to the new PCM. The grey wire is from the relay and goes to power the fuel pump.
'93 Chevy 1500 4X4 ECLB with a '99 Silverado LQ4 6.0 and '99 Escalade 4L60E. SOLD IT!!
New toy: 2001 2500 HD 4X4 Extended Cab Long Bed
John
Yes. I hooked it up that way. The problem is that the grey wire is getting constant power even with the relay discojnected. But its weird because i didnt modify that wire at allOriginally Posted by Mickeymotormount
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