by spencerforhire » Mon Jul 17, 2017 6:26 am
It's a pretty simple circuit; best place to start testing is at the oil pressure switch. You can use a test light or multi-meter. The pink ignition wire should have +12v power when the key is on. The blue pump wire is connected to the purple start wire at rest so the pump will run while you're cranking the engine. Then when the engine is started, oil pressure switches the pump contact over to ignition. If you install a jumper(paper clip, short piece of wire, cotter pin, etc.) between the pink and blue wires and leave the key on, you can then check further along the circuit. Both sides of the fuel pump fuse in the box under the dash should be powered, then you can go to the rear and check right at the connector at the top of the tank. There is also a possibility that the tank has lost it's ground, but that would also make the fuel level gauge inoperable.
The "fleet"-
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
06 Silverado 2WD ex.cab daily
03 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
06 GMC Canyon Shop truck
07 Colorado project( 5.3 4L60e swap)
99 Saturn SL1- wife's car
01 Saturn SC2- son's project
07 Saturn Ion Redline project
and 4 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....
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