Starter wiring diagram the truck tries to start without the key?

Tiny
EXXONAARON
  • MEMBER
  • 1999 CHEVROLET TAHOE
Recently my starter was stolen and I bought a brand new one and I replaced the positive cable. When I connect the battery the truck tries to start without the key in the ignition. I made sure no wires are touching but still the same thing. It is only the 2 wires but something is wrong.
Sunday, May 17th, 2009 AT 8:49 AM

9 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Seems to be a problem with the starter. The starter solenoid is now in full contact with the battery positive cables causing the starter to crank when the circuit is completed by installing the negative cable.Check if there is any foreign materials lodged between the starter solenoid and battery cable connecting point. Is the starter rebuilt or new?
Did you test the starter before installation? If the Starter cable installation mast is loose, installation can cause the internal contact to go out of position resulting in the shorting. Here is the starter wiring and how to check it.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (Below). Let us know what happens and please upload pictures or videos of the problem.
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Sunday, May 17th, 2009 AT 9:13 AM
Tiny
EXXONAARON
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The starter is brand new and it did it when I used a rebuilt starter.
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Sunday, May 17th, 2009 AT 9:35 AM
Tiny
KHLOW2008
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Unplug the starter relay in the under hood fuse box and retry. If problem goes away, the relay is faulty or the starter wire from igntion switch is getting a power supply.
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Sunday, May 17th, 2009 AT 12:38 PM
Tiny
EXXONAARON
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  • 5 POSTS
I unplugged the starter relay and connected the battery terminal and it still did it.
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Sunday, May 17th, 2009 AT 1:19 PM
Tiny
KHLOW2008
  • MECHANIC
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Recheck the starter connections. Remove the starter solenoid wire and retest.

If problrm still exist, check battery to starter cable connection. Ensure it is not touching the solenoid wire. Retest, if problem exist, the fault is with the starter motor.
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Monday, May 18th, 2009 AT 7:38 AM
Tiny
EXXONAARON
  • MEMBER
  • 5 POSTS
  • 1999 CHEVROLET TAHOE
Recently my starter was stolen and they cut the wires so I replaced the positive cable and I dont know if I did it correctly.

I bought a brand new starter. Hooked up the two wires and when I connected the battery it tries to start and the key isnt in the truck.

I checked to make sure no wires were touching but still something is wrong and I dont know what to do.

HELP!
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Monday, June 28th, 2021 AT 7:06 PM (Merged)
Tiny
ZACKMAN
  • MECHANIC
  • 4,202 POSTS


https://www.2carpros.com/forum/automotive_pictures/55316_99tahoestarter_1.jpg


You said the wires were cut, right? Did you install the wires correctly?
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Monday, June 28th, 2021 AT 7:06 PM (Merged)
Tiny
EXXONAARON
  • MEMBER
  • 5 POSTS
This is what I am trying to figure out. By me replacing the entire cable I dont really know. Does the purple wire run to the positive cable or somewhere else?
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Monday, June 28th, 2021 AT 7:06 PM (Merged)
Tiny
ZACKMAN
  • MECHANIC
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The purple wire (attached to the "S" terminal on the solenoid goes to the ignition key. The black wire (attached to "B" terminal) goes to the battery.
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Monday, June 28th, 2021 AT 7:06 PM (Merged)

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