I noticed this summer that sometimes when i press the brake pedal that my lights tend to stay on a few seconds after coming off the pedal. No big deal until today...... now my brake lights are stuck on which is one of the most aggravating things lol.
Through my research..... my trolley bar is in the correct position and I lift up my brake pedal as far as I can and the lights are still on. I let all of the air out of the truck and the lights go off...... I press the brake pedal when all air in the truck in dispensed and they work normal. Build air back up and they come back on....any help??
Im no mechanic and I read something about maybe a stuck brake valve? Would that be under the 5th wheel somewhere?
Also to add...my brake application on the dash is showing about 75 psi(As if im pressing the brake)
2016 W900 Brake lights staying on.....
Discussion in 'Trucks [ Eighteen Wheelers ]' started by nikmirbre, Jan 12, 2025.
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Check to see if the piston in the foot valve is moving freely. It could some dirt keeping it from moving freely. Spray with wd40 & work it up & down.
rollin coal and FLHT Thank this. -
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Also...My cruise controls works fine.
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Big Road Skateboard Thanks this.
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That might explain why cruise still works. Brake lights are opeeated by an air switch, so no air should equal no lights.
900's are bad about getting water into the fuse panel and causing relay issues IMEOLDSKOOLERnWV and Oxbow Thank this. -
If your pedal is sticking get a can of PB blaster and spray under your foot valve. Then work the pedal over and over and over. Dirt and grime will build up under the pedal causing it to stick. My 2015 has done this twice in the last 9 years. I have a brake application gauge so I can verify that the brake pedal is actually sticking because the gauge showed a little pressure when it happened.
OLDSKOOLERnWV, Oxbow, Ruthless and 1 other person Thank this. -
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