brake lights

1999 FORD
62,000 MILES • V10 • AUTOMATIC
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GPMANN
  • MEMBER
  • 1 POST
I have a class A motor home with the F53 chassis and the brake lights do not come on when the brake pedal is pushed. The brake lights do however come on when i push the trailer brake button. changed the brake switch and bulbs and nothing.
Jun 28, 2017 at 9:10 AM
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HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
check the light green wire from brake switch to see if power is there or not. if you have a high mounted stop light and that works then go to t/s switch and check the wires marked for power going in and out of switch if power there then you have a short in wiring leading to stop lights or a bad ground in back where stoplights ground which should be on frame.
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Jun 28, 2017 at 9:47 AM