Exterior lights gremlin
Thread Starter
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4wd High
Joined: Dec 2010
Posts: 9
Likes: 0
Exterior lights gremlin
My '04 F350 Crewcab is giving me a load of grief! Its got 73k miles, SCT tuner, K & N, 4" down tube/Magnaflow and Sinister EGR delete. I'm in the midst of refab'n the FICM to repair low voltage output and reman'd injectors needing to replace one. Ended up replacing IPR, ICP and CPS.
Now, when I use keyfob to lock doors, the exterior lights turn on...the headlights remain off. The headlight switch is in the off position and the alert sounds when I open the driver's door.
The only way to turn the lights of is to disconnect the batteries with the doors closed. The lights turn off and I can reconnect the batteries. I pulled any fuses that appeared related(ign...door locks/security...ext lights...) and none of them turned off the lights.
I fixed all problems myself to this point but sure could use some help here...Thanks
Now, when I use keyfob to lock doors, the exterior lights turn on...the headlights remain off. The headlight switch is in the off position and the alert sounds when I open the driver's door.
The only way to turn the lights of is to disconnect the batteries with the doors closed. The lights turn off and I can reconnect the batteries. I pulled any fuses that appeared related(ign...door locks/security...ext lights...) and none of them turned off the lights.
I fixed all problems myself to this point but sure could use some help here...Thanks
Elder User
Joined: Mar 2005
Posts: 545
Likes: 0
From: Denison, Tx
Just a thought but last year darn squirrels got under dash and hood and chewed wires cost me $500 and insurance company several thousand in wiring replacement. Was acting weird like you describe in addition to trans shift problems..
Thread Starter
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4wd High
Joined: Dec 2010
Posts: 9
Likes: 0
I've inspected the wiring as thoroughly as possible without disassembling the truck...lots of lights, mirrors, sore back...
Just a short while ago I locked the doors with the driver's door lock switch and then closed the door...the exterior lights came on and again I had to disconnect the batteries to shut the lights off.
Thanks for your reply...
Just a short while ago I locked the doors with the driver's door lock switch and then closed the door...the exterior lights came on and again I had to disconnect the batteries to shut the lights off.
Thanks for your reply...
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
My recommendation is to remove turbo timer to see if it resolves
Thread Starter
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4wd High
Joined: Dec 2010
Posts: 9
Likes: 0
I'm getting to the point where removing the turbo timer is about all I have left to try before towing the truck to the dealership...
I've thoroughly inspected the wiring leading to and at the PCM finding all's good. So if there's a check I can do on the PCM itself please advise...
Thanks for your help
I've thoroughly inspected the wiring leading to and at the PCM finding all's good. So if there's a check I can do on the PCM itself please advise...
Thanks for your help
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Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
are you the first owner of the truck?
please look under the dash because is the door are locked with a factory remote you should not be getting anything so far as flashing lights are a horn going off.
I may be misunderstanding your issue too.
please look under the dash because is the door are locked with a factory remote you should not be getting anything so far as flashing lights are a horn going off.
I may be misunderstanding your issue too.
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Thread Starter
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4wd High
Joined: Dec 2010
Posts: 9
Likes: 0
I ordered the truck and have done all the work except for a dealership re-flash to power both sides of the injector solenoids for cold start.
The exterior lights, except for the headlights, come on if I locks the doors using the electric door lock switch on either front door and then close the door. The same happens when the doors are closed and I use the key fob to lock the doors. Nothing else happens and the only way to turn the lights off is to disconnect the batteries. I tried pulling the fuses that were in any way related to security, doors, lighting, ect. and the lights remained on.
I have spent hours inspecting the wiring and find it in good condition...
The exterior lights, except for the headlights, come on if I locks the doors using the electric door lock switch on either front door and then close the door. The same happens when the doors are closed and I use the key fob to lock the doors. Nothing else happens and the only way to turn the lights off is to disconnect the batteries. I tried pulling the fuses that were in any way related to security, doors, lighting, ect. and the lights remained on.
I have spent hours inspecting the wiring and find it in good condition...
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
maybe someone can post the wiring diagram for the lighting/ door lock diagram, it almost sounds like a relay that might be sticking. and i take it this is regardless of the state of the turbo timer, IE the truck is not running when you set the lock?
Thread Starter
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4wd High
Joined: Dec 2010
Posts: 9
Likes: 0
You are correct, it happens when the motor isn't running...
I did change out the relays finding no change.
I was told of a situation where the circuit boards underlying the fusebox had gotten wet causing the backup lights to stay on...
Thanks for your help...
I did change out the relays finding no change.
I was told of a situation where the circuit boards underlying the fusebox had gotten wet causing the backup lights to stay on...
Thanks for your help...
