No Power to Fuel Pump LS1LT1 Forum LT1, LS1, Camaro, Firebird
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Fuel Pump Relay Control - The computer on GM fuel injection systems is designed to control a fuel pump relay. The computer does this by supply a 12v+ (POSITIVE) signal to the relay. The signal is only present for two seconds at key on. Fuel pump operation resumes when cranking over.. 1.INTRODUCTION This harness is designed to be a complete wiring system for the fuel injection system on General Motors 1992 and newer LT1 injected engines and to control the 4L60E transmission. This harness includes all wiring that is needed by the computer to run and control the injection system and transmission.
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For the 1993 fuel pump wiring diagram, check out the following article: 1993 Fuel Pump Circuit Tests (GM 4.3L, 5.0L, 5.7L). Fuel Pump Relay Diagnostic/Troubleshooting Notes: FP relay terminal A (ORG wire): Should have 10 to 12 Volts DC with Key On Engine Cranking or Key On Engine Running (KOER).. LTX and LSX - LT1 fuel pump relay circuit.and power wire ?'s - I'm now going over wiring schematics to hardwire my LT1 harness into the car and I want to delete the mess of the 4thgen chassis harness I had mated with it. Actually it's already gone. I ordered one of those 'stand alone' adapters to use with the.