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If the truck cranks over you have voltage at the ignition switch ! From starter to switch , First off starter to what switch ,ignition ? There is a 175amp fuse that supply's battery voltage to the power distribution center - fuse box under the hood .
On the lower right side of the radiator support, below the battery !
Yank the starter relay in the under dash relay box. Check for battery power on terminals 1 & 2 in the relay socket with the key turned to START. If no power, check fuses 31 and 35. If you have power on those terminals, check for ground on terminal 3 in the socket when turned to START. If no ground, the Security system isn't seeing a good signal from the clutch interlock switch or the auto transmission shift console switch. Check those out
Power flows from Fuse 35 50A to IGN switch. Start by checking that fuse. From IGN switch to starter on black/white wire. Check for battery voltage on that wire at starter. If no voltage, check for voltage on black/white wire at IGN when turned to START. If no voltage, check for good power coming into the IGN switch on the the white wire from Fuse 35
sounds like your ignition switch has gone bad or the connection on your starter......had the same problem in a 91 geo storm a 2000 chevy pickup and the starter issue in my 72 chevelle....i know they aren't the same vehicle but other than checking all of the fuses the ignition switch will render your car useless as well
I think the #1 cause for such is the battery terminals. If not the terminals, a loose nut at the starter solenoid or wire burned off/disconnected at that point. There also must be a bond between the battery negative to the body/chassis. That is usually a second (the smaller) black wire at the negative terminal or a bonding strap from the engine block to the chassis. Though the engine will crank if that bond is missing.
You have a short to ground.What that means is,you have a power wire...............that is grounding on the vehicle somewhere,or possibly back in the fuel pump.The fuel pump theoretically could be shorted internally causing the problem.It also could be a wire or wires back where you were working possibly got pinched.Disconnect negative battery terminal until problem is solved.
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