Berserk

Im so lost when it comes to this now.
2001 Jeep Cherokee

All three brake lights are not working when pedal is pressed.

Running lights working
All lights replaced
Reverse rights work
Turn signals/Hazards work
Brake light switch replaced measured voltage to the plug pin 5 and 6 getting 11.84V
All fuses are good not blown (#7 & 23 including under the hood)

I dont know where all the grounds are aside from the 2 on left rear panel. I had to remove the trailer harness in order to get my drivers side running lights working there was a small cut in one of the wires once i removed it and i didnt blow #7 and my running lights came back however lost brake lights. Im wondering if the trailer harness was part of the whole circuit and needs to be grounded.

Berserk

Bump.

freegdr

You getting power thru brake light switch when depressing pedal ?

Berserk

I removed the brake light switch to make testing easier and I measured pin 5 and 6 i get 11.4V and it drops to 0 when i "play" switch. I put back the switch and did the adjustment and it doesnt touch when the brake pedal is pressed.

freegdr

Ground with trailer harness not needed for regulal lighting . Check for current at plug to lights by back stabbing also check for ground could just be bad connection at plugs.

freegdr

Dosent touch explain ?

Berserk

the plunger sits against the brake pedal at rest and when the brake pedal is pressed i watch it sit 1/8" away from the pedal. i thought that this is normal operation.

so even though my running lights work the plugs could be bad and cause both brake lights to not work?

freegdr

freegdr

Switch needs to be adjusted should be no gap.

steelybill

Maybe i missed something here, but brake lights power usually comes through the turn signal switch....

Berserk

i adjusted the switch and still no brake lights.

turn signal switch? could this be the culprit? how would i test this?

freegdr

Check if theres power at the switch b4 going any further would be best ....

Berserk

with the plunger on the switch pushed in 0V with the plunger extended 11.4V

freegdr

see if theres power in and out of switch here.....

freegdr

Ok so powers going thru switch. No check at harness at rear where trailer harness was plugged in. Or go some where else and dont ...