Truck Wont Turn Off!

[eightyone]

help. i just put a 350 from an 85 dumptruck into an 89 suburban. and im using the alternator from the 85. and i cant get the truck to turn off. i need to disconect a wire from the post on the back of the alternator to get the truck to turn off. can anyone explain how to wire this for me? is it even possible?

 

[454k30]

sure its possible. I would think that it would meen that your ignition relay is stuck in the on position or is wired straight to a hot lead.

 

[southernspeed]

You've got an ignition feed wire hooked up to alternator output , so all the time the truck is running , it's getting a power source from the alt. Check your wiring again.

 

[Greg72]

Sounds like my starter problem I asked about yesterday.....

My truck starts, but the solenoid won't retract and keeps cranking.

Yesterday I pulled the key completely out of the ignition and it still sat there running and cranking at the same time. SCARY!