Dome light will not come on

Tiny
CSA1
  • MEMBER
  • 2001 FORD F-150
  • 5.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 235,000 MILES
My truck is the Lariat. It is having a odd electrical problem. Up until a couple weeks ago, everything worked fine, but last week, the dome light will not come on and windows will not roll down. Checked all the fuses and they are all good. Any idea's what I should check next? Had a friend tell me it is possibly the G.E.M. Gone bad?
Wednesday, February 8th, 2017 AT 11:25 AM

8 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Both are hooked up to the GEM module and also the battery saver relay. The lights also run through the interior light relay.
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Wednesday, February 8th, 2017 AT 12:18 PM
Tiny
CSA1
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  • 78 POSTS
Should I start with GEM or battery saver relay?
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Wednesday, February 8th, 2017 AT 12:23 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try the battery saver relay. It is probably the cheapest and will not need a reprogram.
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Wednesday, February 8th, 2017 AT 3:47 PM
Tiny
CSA1
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Replaced battery save relay & GEM, still no power to windows & dome light
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Saturday, February 11th, 2017 AT 10:51 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
Just slinging out an idea.

Maybe you have a problem similar to these?

https://www.2carpros.com/questions/jeep-cherokee-2004-jeep-cherokee-driver-door-electrical-problem/page/3

Keep us posted.

The Medic

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Saturday, February 11th, 2017 AT 11:37 AM
Tiny
CSA1
  • MEMBER
  • 78 POSTS
Checked the grounds, all good & ohmed out like they should, It's like a relay or fused is popped somewhere, but all the fuses are good & I replaced the battery save relay, If the windows have their own relay, I'll be damned if I can find it :/
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Saturday, February 11th, 2017 AT 11:51 AM
Tiny
CSA1
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Question, after changing the GEM ( Numbers matched ) does it need to be reprogrammed?
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Saturday, February 11th, 2017 AT 12:27 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,622 POSTS
Hey,

I have heard of people plugging them in and they work, but then others times they don't and they will need to be reprogrammed.

Please let us know happens so it will help others.

Best, Ken
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Wednesday, February 15th, 2017 AT 9:52 AM

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