snarl95
Well-Known Member
Can a starter short out internally and engage on its own while driving?
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Starter woes.
- Thread starter snarl95
- Start date
ak diesel driver
6.5 driver
Wow I guess anything is possible. Maybe a loose ign switch was triggered by a bump? Or the solenoid by itself from a bump?
ak diesel driver
6.5 driver
Or wiring chafed into another hot wire in the harness?
Will L.
Well-Known Member
I’ve seen it once on a 6.5. Something went crazy in The solenoid, it cranked until the side posts melted out of the batteries (never starting because the key was off).
Two guys went through the harness independently then together- no issues were found. Stater was smoked obviously.
New starter, new batteries, all was fine.
Two guys went through the harness independently then together- no issues were found. Stater was smoked obviously.
New starter, new batteries, all was fine.
Big T
Well-Known Member
Who’s starter? Was it Chinesium?
Will L.
Well-Known Member
A service truck. I can’t remember what type starter it was, might have been a delco but idk. This was 20 years ago.
Once removed, I hooked up a set of jumper cables to test the starter and it started cranking as soon ground as the main cable was hooked up.
Once removed, I hooked up a set of jumper cables to test the starter and it started cranking as soon ground as the main cable was hooked up.
snarl95
Well-Known Member
The REMY starter died so I got Famous Brand (carquest) on closeout from rockauto. So I'm going to chase some wires before I buy another starter. But I'm 95% sure the current starter is bad. Now to find a wiring diagram.
snarl95
Well-Known Member
Could a bad ignition switch be a possibility?
Will L.
Well-Known Member
Yes the ignition is a possibility. So is shorted wires in the harness.
MrMarty51
Well-Known Member
If the purple solenoid wire has rubbed through or shorted to a live wire, that will cause the starter to self crank.
snarl95
Well-Known Member
I have a new starter on the way. I'll swap it out and go from there.
snarl95
Well-Known Member
Wasn't the starter. So time to trace wires.
GM Guy
Manual Trans. 2WD Enthusiast
does the issue stop when you remove the starter relay in the underhood box?
I have a 2000 C2500 6.5 that is doing the same thing, removing the relay stops it so I feel that eliminates everything but cab wiring or switches. 97? I believe? and newer went to a wonky dual function clutch safety switch on the manuals and since its also tied into the cruise Im going to replace it as a precaution, but im really leaning towards the ignition switch.
mine being a 2000 the previous owners managed to get the wrong key lock cylinder (gmt800) so I have a proper GMT400 Key cylinder, now I need to get it tagged and title swapped to me so I can have the local GM dealer cut keys to the VIN and calibrate the new lock cylinder, then I can install it and the new switch, and if that fixes it, then its time for the new clutch, and bilsteins, then its ready to do some towing. If it doesnt fix it, it will stay parked till I mess with it some more!
I have a 2000 C2500 6.5 that is doing the same thing, removing the relay stops it so I feel that eliminates everything but cab wiring or switches. 97? I believe? and newer went to a wonky dual function clutch safety switch on the manuals and since its also tied into the cruise Im going to replace it as a precaution, but im really leaning towards the ignition switch.
mine being a 2000 the previous owners managed to get the wrong key lock cylinder (gmt800) so I have a proper GMT400 Key cylinder, now I need to get it tagged and title swapped to me so I can have the local GM dealer cut keys to the VIN and calibrate the new lock cylinder, then I can install it and the new switch, and if that fixes it, then its time for the new clutch, and bilsteins, then its ready to do some towing. If it doesnt fix it, it will stay parked till I mess with it some more!
snarl95
Well-Known Member
I've eliminated the starter as the issue. I had rigged a switch on the purple wire and had the same noise issue. I'm now looking at a transmission issue.
MrMarty51
Well-Known Member
Cracked flex plate or torque convertor bolts come loose ?