Electrical gremlins are making me crazy!!!
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Senior User
Joined: Dec 2001
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From: Central OH
Electrical gremlins are making me crazy!!!
Hi all,
I have a 2002 F150 that is giving me fits. Here is what happenes. Originally the windshield leaked on the drivers side "A" post slightly which didn't bother me much until it got to the relays/fuses.? The leak is fixed but one problem that still persists is...if I turn on my High beams the radio goes dead. I mean dead. No clock or anything...and I hear a click? by the relays. As SOON as I turn off the High beams...presto! the radio works perfectly. I don't know if this is a seperate issue or not? My front map lights (individual dome lights) will not switch on independently or with the dimmer/dome dial by the headlight switch. Now the rear map/reading lights will not switch on independently either but they do come on with the dimmer/dome switch turned to on.
Other than these problems the truck is still going great with 106,000
Thanks in advance.
I have a 2002 F150 that is giving me fits. Here is what happenes. Originally the windshield leaked on the drivers side "A" post slightly which didn't bother me much until it got to the relays/fuses.? The leak is fixed but one problem that still persists is...if I turn on my High beams the radio goes dead. I mean dead. No clock or anything...and I hear a click? by the relays. As SOON as I turn off the High beams...presto! the radio works perfectly. I don't know if this is a seperate issue or not? My front map lights (individual dome lights) will not switch on independently or with the dimmer/dome dial by the headlight switch. Now the rear map/reading lights will not switch on independently either but they do come on with the dimmer/dome switch turned to on.
Other than these problems the truck is still going great with 106,000
Thanks in advance.
Senior User
Joined: Aug 2003
Posts: 289
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Its hard to help with this without looking at it, you may have corrosion and bad connections in the computer from the water or it could just be bad now (or you could just have separate problems). My 97 expy had the windshiled leak and after getting that fixed I was able to solve my problem by removing it and spraying 2 cans of electircal contact cleaner through it and letting it dry out, never had another problem after that. Before the fix most of my gremlin were headlight, dash lights and idiot lights doing random things, I never had dome light issues and the only click I was getting was from the 4wd selector. Its a pain to get it al straightened out but well worth it.
Senior User
Joined: Mar 2007
Posts: 403
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From: Medina TN
Do your windows work if the high beams are on, assuming you have power windows? You probally got water in your GEM module which is on the firewall inside the cab on the drivers side I think. If it is fried you will need a new one to fix the "gremlin". There have been several threads on this issue in the past that always start with a windshield leak. Someone else will clarify this for you, I personally have not had to deal with it. Good Luck...
Posting Guru
Joined: Oct 2005
Posts: 2,209
Likes: 1
From: Louisville, Kentucky
Yep, your GEM will have to be replaced because of the water damage. Here is the beginning statement for the removal and replacement instructions in the service manual on the 2002 F-150.
1. CAUTION:
Prior to removal of the GEM, it is necessary to upload module configuration information to a diagnostic tool. This information needs to be downloaded into the new module once installed. For additional information, refer to «Section 418-01».
Disconnect the battery ground cable. For additional information, refer to «Section 414-01».
Good luck!
1. CAUTION:
Prior to removal of the GEM, it is necessary to upload module configuration information to a diagnostic tool. This information needs to be downloaded into the new module once installed. For additional information, refer to «Section 418-01».
Disconnect the battery ground cable. For additional information, refer to «Section 414-01».
Good luck!
New User
Joined: Aug 2009
Posts: 1
Likes: 0
Hi I keep blowing a fuse to my cluster lights all of my other light work inside like turn signal, high beam, etc but after my headlight are on for a while the fuse blows I'v been told that it maybe my headlight switch. any help
lawman
lawman
Posting Guru
Joined: Apr 2005
Posts: 1,035
Likes: 2
From: duncan oklahoma
Hi all,
I have a 2002 F150 that is giving me fits. Here is what happenes. Originally the windshield leaked on the drivers side "A" post slightly which didn't bother me much until it got to the relays/fuses.? The leak is fixed but one problem that still persists is...if I turn on my High beams the radio goes dead. I mean dead. No clock or anything...and I hear a click? by the relays. As SOON as I turn off the High beams...presto! the radio works perfectly. I don't know if this is a seperate issue or not? My front map lights (individual dome lights) will not switch on independently or with the dimmer/dome dial by the headlight switch. Now the rear map/reading lights will not switch on independently either but they do come on with the dimmer/dome switch turned to on.
Other than these problems the truck is still going great with 106,000
Thanks in advance.
I have a 2002 F150 that is giving me fits. Here is what happenes. Originally the windshield leaked on the drivers side "A" post slightly which didn't bother me much until it got to the relays/fuses.? The leak is fixed but one problem that still persists is...if I turn on my High beams the radio goes dead. I mean dead. No clock or anything...and I hear a click? by the relays. As SOON as I turn off the High beams...presto! the radio works perfectly. I don't know if this is a seperate issue or not? My front map lights (individual dome lights) will not switch on independently or with the dimmer/dome dial by the headlight switch. Now the rear map/reading lights will not switch on independently either but they do come on with the dimmer/dome switch turned to on.
Other than these problems the truck is still going great with 106,000
Thanks in advance.
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