Ignition Wiring Problem
Thread Starter
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New User
Joined: Mar 2014
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Ignition Wiring Problem
When i start my truck,
it starts just fine,
but if i have the headlights on,
then turn the truck off with the ignition it stays running
until i turn the headlights off???
Please Help,
it starts just fine,
but if i have the headlights on,
then turn the truck off with the ignition it stays running
until i turn the headlights off???
Please Help,
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
When you turn the key off and the engine stays running - do the wipers, radio, heater fan, etc. also remain operative? Or is all that electrical stuff inoperable (as it should be) but just the engine stays running?
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Legoman - Welcome to FTE! And please excuse our moderator for not welcoming you himself - he was probably high on cleaning fumes. 
However, you do need to answer his questions as he is implying there may be a problem in the switch or its adjustment. But if that doesn't lead anywhere slide under the dash and look at the wiring going to the headlight switch. That wiring is known to overheat and melt into surrounding wires. If it has melted to the wire going to the ignition it would do what you are experiencing.
However, you do need to answer his questions as he is implying there may be a problem in the switch or its adjustment. But if that doesn't lead anywhere slide under the dash and look at the wiring going to the headlight switch. That wiring is known to overheat and melt into surrounding wires. If it has melted to the wire going to the ignition it would do what you are experiencing.
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
High on cleaning fumes, eh? 
No, it was close to 1AM when I posted that...
No, it was close to 1AM when I posted that... I actually didn't do much cleaning this time, the maids are keeping up in an "OK" fashion... so I did some house maintenance stuff - re-hang a falling-down gutter, re-installed a lamppost, stuff like that.
My questions to him - does the other electrical stuff work or not - is to try and get an idea of where the problem may be... if all that stuff still works when turning the key to OFF, the problem is definitely in that switch area. But if it's just the engine staying powered, well, that opens up all kinds of possibilities (as I'm sure you can image).
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
High on cleaning fumes, eh? No, it was close to 1AM when I posted that...
No, it was close to 1AM when I posted that... I actually didn't do much cleaning this time, the maids are keeping up in an "OK" fashion... so I did some house maintenance stuff - re-hang a falling-down gutter, re-installed a lamppost, stuff like that.
My questions to him - does the other electrical stuff work or not - is to try and get an idea of where the problem may be... if all that stuff still works when turning the key to OFF, the problem is definitely in that switch area. But if it's just the engine staying powered, well, that opens up all kinds of possibilities (as I'm sure you can image).
Thread Starter
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New User
Joined: Mar 2014
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yes everythign electronicall works fine
radio,
heat,
dash lights
interior lights
dome light
its all working properally
but idk why the engine stays running with the headlight switch on
when i take the key out of the ignition and turn the headlights off the engine shuts off
radio,
heat,
dash lights
interior lights
dome light
its all working properally
but idk why the engine stays running with the headlight switch on
when i take the key out of the ignition and turn the headlights off the engine shuts off
Thread Starter
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New User
Joined: Mar 2014
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and no nothing is powered when the key is out the ony thing that stays powered is the engine
i could post a video lol
i could post a video lol
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FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
.......But if that doesn't lead anywhere slide under the dash and look at the wiring going to the headlight switch. That wiring is known to overheat and melt into surrounding wires. If it has melted to the wire going to the ignition it would do what you are experiencing.
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FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
I don't fully understand what was going on, but glad you got it fixed.
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