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Old 05-28-2014, 09:26 AM   #1
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1976 24' Argosy 24
Victor , New York
Join Date: Sep 2012
Posts: 360
Brake lights always on

Recently I have noticed that my brake lights are always on, even after the key is off. If I pull up on the pedal really hard I can get them to turn off, however, I need to use a lot of force. Is there some adjustment under the dash that I can change? It was hard to see under there so I figured I would ask first in case someone else has seen/done this.

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Old 05-28-2014, 10:16 AM   #2
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1974 31' Sovereign
1993 21' Sovereign
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The stoplight switch on your motor home should be adjustable.
Unplug it, and rotate the switch on its threads until it is slightly closer to the brake pedal. Usually, however, the reason this happens is the plastic threads have stripped, allowing the switch to ride up to the point the lights stay one. If you crank the switch down far enough that no longer happens, the brakes themselves will be slightly applied.

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Old 05-28-2014, 10:24 AM   #3
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1982 28' Airstream 280
Port Angeles , Washington
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Posts: 1,191
There is quite bit of linkage from the pedal to the master cylinder. The pedal pushes a rod through the firewall to a bell crank to a rod that goes down to another bell crank to a rod that connects to the master cylinder. Lack of use can allow corrosion to bind the system. Cleaning the joints and lubrication will fix your problem. The is a picture of the system in the P-30 Service manual. I can try to copy it later if you need.
Cheers, Dan

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Old 05-28-2014, 10:38 AM   #4
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1991 34' Excella
Princeton , New Jersey
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The stop light switch is a normally open switch that closes as you depress the brake pedal. For what ever reason the brake pedal arm is not returning enough to open the switch. It could be, as noted above, the linkage. It could be a weak return spring. Less likely is the switch adjustment as there is little that would have caused that to move.

Try lubing the linkage first than look at the pedal return spring. Adjusting the switch at this point may just be masking the original problem.
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1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

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Old 05-28-2014, 11:27 AM   #5
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1976 24' Argosy 24
Victor , New York
Join Date: Sep 2012
Posts: 360
I will check the linkage over and also adjust the switch. The pedal does return to the top without any issues so hopefully the switch just needs some messing with.

Last night I did reach up trying to feel for the switch but had no luck so thats why I wrote this. If I have time tonight I will look at it, however, I think it will be tomorrow.

Smartstream, thanks for offering to copy the service manual but I already have a copy of it. It came with my Argosy!
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Old 05-28-2014, 01:21 PM   #6
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If your lights are on and draining the battery, you can pull a fuse temporarily. Do not drive that way because your brake lights will not work. Jim
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Old 05-28-2014, 06:22 PM   #7
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1976 24' Argosy 24
Victor , New York
Join Date: Sep 2012
Posts: 360
It's fixed! The issue was much simpler than I thought and I feel embarrassed to tell you. The switch has two metal nuts on it that you can push on but need to twist off. Well one had loosened up and caused the switch to come loose. I took the nut off, rebent it, and put it back on. Problem solved

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