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Old November 28th, 2009, 05:14 PM   #1
chevy38s5342
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Default 1994 GMC Sierra troubleshooting: NEED HELP

i replaced the starter and battery in effort to get my truck started, but it didnt. i found that the purple wire going to the solenoid is not getting power when the ignition switched on, so i replaced the ignition switch. that didnt work. i already went through and checked and double checked and cleaned the connections everywhere, grounds and positives, im out of ideas now. can anyone help?? the truck doesnt do anything when i turn the key, the gages all look like its trying to start, and the radio turns off like normal when i turn the key but it doesnt even make a noise..

any ideas are welcome :)
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Old November 28th, 2009, 05:21 PM   #2
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You probablly have a burn conection at the firewall bulkhead connector. most likely where the harness pops through and connects. test your circut and if it ends there you found the problem. most likely a corroded spade connector. if you don't take it apart you can route a new wire through the fire wall and out to the other side where you can connect the circut again.
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Old November 28th, 2009, 05:23 PM   #3
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could have a bad starter relay in the under hood fuse box, bad neutral safety switch or clutch interlock switch start checking for power at the starter and work your way back u will find the problem
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Old November 28th, 2009, 05:25 PM   #4
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i did take the block off the firewall on the engine side, and tested the end of the wire by the starter, and the block side and it was conductive, so i know from the starter to the firewall the purple wire is good, and all connectors looked good...
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Old November 28th, 2009, 05:31 PM   #5
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Thats a good sign. I guess you just have to find out why the power isn't coming to the engine side? the longer I sit and think about it you may have to drop the colum down to the get at the switch to test it. its been a few years but they are mounted on top the colume tube and are a bitch to reach. I guess if you can find the main power into the switch you should be able to turn the key and see if its coming out? if not your back to a bad switch.
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Old November 28th, 2009, 05:34 PM   #6
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ya i did and it was a pain in the ass, i got a new switch and it didnt solve the problem, i didnt start lookin at where the power comes into the switch but it sure isnt coming out of the switch when the key is turned.
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Old November 28th, 2009, 11:00 PM   #7
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Neutral switch maybe. Have you tried starting it in the neutral position?
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Old November 29th, 2009, 10:46 AM   #8
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Neutral switch maybe. Have you tried starting it in the neutral position?
x2 neutral safety has to work for it to start.
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Old November 29th, 2009, 10:56 AM   #9
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not sure if the that year of truck has one but there is a inline fuse going to the starter but if i remember right it was a red wire been awhile since i've worked on one but if it's bad it will do nothing when you turn the key. i think it was close to the starter on the one's i've worked on. look's kinda like a fuseable link and it's black but the truck's that i know that have these are 87 older.

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Old November 29th, 2009, 04:50 PM   #10
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not sure if the that year of truck has one but there is a inline fuse going to the starter but if i remember right it was a red wire been awhile since i've worked on one but if it's bad it will do nothing when you turn the key. i think it was close to the starter on the one's i've worked on.
There is a neutral safety switch on that truck, it's on the back of the steering column when looking at it fromt he floor, it's near the fire wall, it looks like a pair of white plastic brass knuckles (closest i can describe it lol) minues the holes lol

and my 96 tahoe is kinda doing the same thing, except if you turn the key to the "on" position, you can start it by pushing down the starter relay in the fuse box under the hood, f-ing weird
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Old November 29th, 2009, 05:06 PM   #11
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There is a neutral safety switch on that truck, it's on the back of the steering column when looking at it fromt he floor, it's near the fire wall, it looks like a pair of white plastic brass knuckles (closest i can describe it lol) minues the holes lol

and my 96 tahoe is kinda doing the same thing, except if you turn the key to the "on" position, you can start it by pushing down the starter relay in the fuse box under the hood, f-ing weird
don't know why you quoted me what i was describing has nothing to do with the neutral safety switch
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Old November 29th, 2009, 07:15 PM   #12
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Quote:
Originally Posted by sanman View Post
not sure if the that year of truck has one but there is a inline fuse going to the starter but if i remember right it was a red wire been awhile since i've worked on one but if it's bad it will do nothing when you turn the key. i think it was close to the starter on the one's i've worked on. look's kinda like a fuseable link and it's black but the truck's that i know that have these are 87 older.

yeah the system has 3-4 if I remember right. theres one on the starter that attaches with the battery cable. then one off the Alt. then two more under that plastic shield above the heater box. most went to a jucntion block there. on the flip side if you find one bad you probablly found the problem.
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Old November 30th, 2009, 12:13 PM   #13
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Fixed it, thanks for the help guys!
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Old November 30th, 2009, 12:14 PM   #14
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check the fusible link
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Old November 30th, 2009, 05:08 PM   #15
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Fixed it, thanks for the help guys!
so what ended up being the problem?
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Old December 1st, 2009, 08:29 AM   #16
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high resistance ground wire, swapped in a ground strap and it fired right up. lol wasted 25 bucks on a ignition switch but i guess i dont need to worry about that going bad anytime soon!
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Old December 1st, 2009, 08:30 AM   #17
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cool glad it was an easy fix
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