brake lights are on all the time

yamahardr4e · #1 (**permalink**) 10-27-2009, 04:55 PM

ok i have a 04 f250 and when i have my headlights on my brake lights are also on all the time. my third brake light is off until i step on the brake but the rear taillights are always on as if im stepping on the brake. what is causing this?? thanks

***forddieseldoctor*** · #2 (**permalink**) 10-27-2009, 07:56 PM

do the brake lights work normally when you have the headlights off?

yamahardr4e · #3 (**permalink**) 10-28-2009, 04:09 PM

no they dont when the headlights are off. but the third brake light is fine just the 2 tails

yamahardr4e · #4 (**permalink**) 10-28-2009, 04:27 PM

is there a wiring harness diagram online so i could follow all the wires to the taillights?

***forddieseldoctor*** · #5 (**permalink**) 10-28-2009, 07:39 PM

Not Good
Read this post. The wires colors should match up. It tells you what you're supposed to have at the multi function switch. My guess is that your multifunction switch is bad. The brake light feed comes in from the switch and then goes through the multifunction switch to the turn/brake lights. The third brake lights bypass the multifunction switch. this is why they still work.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode