Hello all! I have a 1999 F-150 Flareside Lariat extra cab that after strong rains/weather, and full shutdown, headlights begin to flash, A/C fan continues to blow, and if driving the radio/windows go non-functional. If left connected to the battery by morning the battery gets killed. (New Interstate battery). Any idea of the origin of this problem?

 

im willing to bet your windshield is leaking and getting onto the GEM

 

"GEM" is which control module?

 

General Electronic Module.

@white89gt knows a little more about it than i do

 

Welcome..
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Welcome.