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Tail lamps stay on draining batteries

1K views 6 replies 3 participants last post by  7.3 Jay 
#1 ·
Went to start the truck the other morning and no go, batteries dead. Got recharged, went to connect and had a 6amp draw! Noticed rear taillamps were on. Went thru all the fuses and lamps stayed on -- any ideas? 2001 F350 7.3L tks Jay
 
#3 ·
Brake light switch.
Fords are know for it!!!

It is on the brake pedal arm.
 
#6 ·
Now that is weird!
Well it would have to be getting a power back feed from something else.

Is the voltage at the light a full 12v?

Anything else going on that is different?
 
#7 ·
tail lamps staying on

Got another chance to try something... got into the dash wiring and disconected the trailer brake unit ... behold - rear brake lights went out! Must be in the controller, only got a .4amp drain on batteries now (alarm/radio/ecm etc). Going to have that controller checked out. thanks for all the replies and ideas to all. If this does not correct the issue - I'll be back. thanks again. Jay:nod:
 
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