Shut off solenoid shorted out...

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Shut off solenoid shorted out...

Postby powerage » Mon Mar 19, 2012 4:29 pm

My 92 2500 2wd died after my wife started it , and there was nothing when she turned the key, well after taking a look at it one of the fusible links was done, so I replaced it with a fuse...as soon as I turned the key all the way to the start position it would blow the fuse. I have traced it to the shut off sol., if I disconnect the wires the truck will crank over fine but wont start, I assume because the sol. is stuck in the position and blocking any fuel from getting to the engine. The sol. appears to be completely shorted out, as I get continuity from both of the connectors to ground...so I guess it has fried internally somehow? Anyone ever seen or heard of this? From the reading I have been doing on here, it seems that when it fails it just wont let you turn it off. I am gonna remove it and try and gut it and put a cable on ,but am really curious if anyone else has seen this? Oh and does anyone know what size wrench I will need to try and get it off? Thanks in advance!

Steve
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Re: Shut off solenoid shorted out...

Postby PToombs » Mon Mar 19, 2012 4:53 pm

Steve, a 15/16 wrench fits, or you may have to whack it with a chisel to get it moving if the wrench won't go on. You may have to loosen the nut and remove the electrical tab on the stud to allow it to unscrew. Most of us bend/cut/break the top of the flat bracket on the end of the pump to get it out of the way. It gives quite a bit more clearance. I cut mine most of the way then bent it back and forth with a crescent wrench to break it off. Screw the solenoid out and then remove the plinger and spring. Then install the solenoid back and see if the truck starts. You can shut it off with the lever on the side of the pump.
You should have continuity to ground on it as it is a coil, I just don't know what the ohms reading is on it. One wire is the power to the solenoid, the other is the power to the KSB. Maybe the KSB wire is shorted. Pull both wires, find which has power, and put that one on and see if it blows the fuse. If so, bad solenoid. If not, leave the KSB unhooked and drive it!
And look for the bad spot later. ;)
pete

Just enough power to break everything behind the crankshaft.
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