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Starter turns when key out of ignition

Jbulach

Jbulach

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Disconnect the batteries!???

Your post is a little vague, but I'm betting your starter solenoid is stuck closed...
 
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Paycheck

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Jbulach said:
Disconnect the batteries!???

Your post is a little vague, but I'm betting your starter solenoid is stuck closed...
Click to expand...
Ok, batteries won't charge have generator#2 light on tried jumping with my jeep then the terminal started smoking and one of the wires caught fire I yanked the key from the ignition and the motor was still turning over until the battery died. Later I tried jumping from the junction box on the inside passenger aside behind the passenger seat then I smelt electric burning. I towed it home charged both batteries and when I plugged them up the motor started turning mind you the keys were still in my pocket I pulled both alternators and the starter out tomorrow I will have all three bench tested my question is could it be the module under the dash. I've never had a vehicle that ran after the key was pulled I'm at a loss,thank you for any help you can give.


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Paycheck

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Doghead relay mod on my M1028

Mine has the mod done by previous owner however tonight pulled keys and starter kept turning good thing my batteries were low tried jumping and smelled smoke hoe I didn't fry the starter took starter and both alternators off taking them to bench test tomarrow but I will be investing in a new relay also wish I would have seen this before I yanked starter it was a pain getting to the top bolt


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firefox

firefox

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I repeat: DO NOT connect your batteries up until you replace the relay as
in the doghead mod which is in the CUCV helpfull hints.
Unless of course you want to burn up your truck.

That relay is stuck and routing power directly from the batteries to the solenoid/starter.
The ignition switch no longer plays a part in this.
 
Last edited:
cucvrus

cucvrus

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Paycheck said:
Mine has the mod done by previous owner however tonight pulled keys and starter kept turning good thing my batteries were low tried jumping and smelled smoke hoe I didn't fry the starter took starter and both alternators off taking them to bench test tomarrow but I will be investing in a new relay also wish I would have seen this before I yanked starter it was a pain getting to the top bolt


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Click to expand...
Check the starter to ring gear engagement. Is it correct? It could be getting stuck out in the ring gear. It may need a shim between the starter and the mounting boss on the block. It could also be a 12 starter or starter solenoid. Also the DH relay can fail. I see Fords do it all the time. Ever see a guy beat a relay with a hammer on a Ford. That is why I never do the DH mod. Nothing is fool proof if something else can go wrong. Double check and triple check all the fusible links and correct everything and get the starter looked at by a competent shop. You tube is not am competent lesson in starter rebuilding. There is more to a starter then that. Please report back. I am trying to help.
 
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Rvitko

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Sounds like the same thing that happened to me.

batteries were weak, voltage drop led to high amp draw by the starter, the starter solenoid contact plate welded on from arcing. This would also have killed your alternators and burned a few fusible links. I had to rebuild both alts and the starter, replace the batteries and battery cables and 3 fusible links.
 
porkysplace

porkysplace

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Paycheck said:
Ok, batteries won't charge have generator#2 light on tried jumping with my jeep then the terminal started smoking and one of the wires caught fire I yanked the key from the ignition and the motor was still turning over until the battery died. Later I tried jumping from the junction box on the inside passenger aside behind the passenger seat then I smelt electric burning. I towed it home charged both batteries and when I plugged them up the motor started turning mind you the keys were still in my pocket I pulled both alternators and the starter out tomorrow I will have all three bench tested my question is could it be the module under the dash. I've never had a vehicle that ran after the key was pulled I'm at a loss,thank you for any help you can give.


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Click to expand...
It could be wires melted together now , it very well could have been cause by the relay under the dash . Pulling the battery cable would have been the best thing to do when it kept cranking. Look at the Doghead starter rely mod thread.
[h=1]doghead starter relay modifcation[/h]Your going to end up reading a lot of these threads
STARTER
CUCV Stock Starter Circuit
http://www.steelsoldiers.com/showthr...tarter-Circuit

CUCV Doghead Starter Relay Modification
http://www.steelsoldiers.com/showthr...ay-modifcation

http://www.steelsoldiers.com/showthr...od-on-my-M1028

Doghead Starter Relay mod poll
http://www.steelsoldiers.com/showthr...lay-Conversion

Starter Brackets, Bolts and other Info.
http://www.steelsoldiers.com/showthr...cket-bolt-size

Burned Fusible Links after Starter Run on Explained and Illustrated
http://www.steelsoldiers.com/showthr...nd-Illustrated

Fusible Links 101
http://www.steelsoldiers.com/showthr...ible-Links-101

Starter Rebuild Kits
http://www.steelsoldiers.com/showthr...mp-repair-kits

Old Style Direct Drive MT-27 Starter Rebuild
http://www.steelsoldiers.com/showthr...-Rebuild-quest

Another cause for Starter run-on
http://www.steelsoldiers.com/showthr...ter-nose-conep
CUCV Color Wiring Diagrams
http://www.steelsoldiers.com/showthr...(except-M1010)
CUCV Fuse Box Layout
http://www.steelsoldiers.com/showthr...use-Box-Layout

CUCV Electrical Ground Locations
http://www.steelsoldiers.com/showthr...ound-Locations

CUCV Switches Diodes Relays
http://www.steelsoldiers.com/showthr...-Diodes-Relays
Fusible Links 101
http://www.steelsoldiers.com/showthr...ible-Links-101
 
Mainsail

Mainsail

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Paycheck said:
Ok, batteries won't charge have generator#2 light on tried jumping with my jeep then the terminal started smoking and one of the wires caught fire I yanked the key from the ignition and the motor was still turning over until the battery died.
Click to expand...
Can you explain this in detail, using proper punctuation so it makes sense? You connected 12v red from your jeep to....?
 
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