Possible Fix

I just picked my truck up yesterday from the shop. My radio would lose power and the wipers would sometimes not work. Also, my fan would stay on as well after turning the engine off and removing the key. This happened last week during a heavy rain. The shop said they did some research and found alot of F150's would leak and the water would run down to the fuse panel. They said it could be the GEM module, however, they would need to take apart the dash and remove the fuse panel to validate the leak, for $350. I said no thanks. The truck works fine most of the time when it is dry. They understood and said to keep an eye on the weather when it happens again. I checked the fuses and relays as well and they were fine. The next thing I may look at is the seal around the windshield and then any location below it that water may get in. Good luck! Hope this helps.

RH
Oswego, IL
F150 Supercrew - 2003

 

You've experienced a fairly well documented problem. If you do a little searching here, you'll find you're not alone.

 

sealing it up is the first step. No point in replacing something if its gonna happen again because the root cause still exists