Brake light issue 87FC35

[xz3kg7]

Ralph, What does the brake air switch look like? I'll pull my grill and access
panel... I'm just not sure what I'll be looking for.

Thanks,
Alan

--- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
wrote:
>
> Hi Alan:
>
> There are several things that can cause this problem, but if we try to
> think of them all at this point, I think it would muddy the water to the
> point of not finding any thing.
>
> First things to check:
> There are 2 break air switches (yes I know you did not use the break, but
> that does not make a bad switch good.) that can cause this problem, be it a
> boarder line switch going out or one that had become sensitive to a
> changing air pressure at certain speeds. These should be located in the
> compartment under the drivers seat, out side. Also check any and all
> connections in that area.
>
> Then I have seen certain speeds set up a harmonic vibration in tail light
> units, and if I remember correctly, you have the elongated Volvo style rear
> light sets. The contacts on the lights them selves are fairly close
> together and can short easily if not heat shrinked. One way to find this
> out is to find a relatively lite used road, and dis connect one tail light
> and go to the speed, then the other if no change. And what your looking for
> is change when you change the set up from normal.
>
> The over head relay clicking may be due to the spurious voltage being
> generated by wiring that is vibrating together else ware. I am going to go
> with my gut feeling on it and say that I believe you are going to find a
> problem with one of the tail light assemblies or related wiring.
>
> Safe travels,
>
> Ralph and Charolette Fullenwider
> "84FC35 "Ruff Diamond"
> Duncan, Oklahoma
>
> At 02:13 PM 9/28/2010 +0000, you wrote:
> >During a recent trip I noticed my brake lights flickering, then often
> >getting stuck on. (I could see them at night in my camera). This coincides
> >with a relay in my overhead cabinet chattering.
> >
> >Here is an experiment I tried. (slowed down w/o stepping on brake):
> >1. I am driving at highway speeds, then have to slow down for small town
> >2. I flip the switch and turn off cruise (i do NOT step on brake)
> >3. As I slow down, somewhere between 35 and 45, a relay in the overhead
> >starts chattering. The brake lights (as seen in camera) are now
> >flickering, corresponding to relay chattering.
> >4. Somewhere below 35, chattering stops, and brake lights are off (as they
> >should be).
> >5. Now let's say I speed back up, all the time WITHOUT stepping on brake.
> >Again, between 35 and 45 chattering starts.
> >6. Around 45, the chattering will stop, but OFTEN the BRAKE LIGHTS STAY
> >ON. So now, I am driving highway speeds with my brake lights on, and of
> >course the cruise will NOT engage. (I used to think I had a cruise problem).
> >
> >So, here would be my questions:
> >1. First, does this chattering at certain speeds and then staying on make
> >sense to anyone?
> >2. Where is the brake switch? (I have tried pulling up on pedal)
> >3. Electrically, what is SUPPOSED to happen when I step on the brakes.
> >(and where would this overhead relay fit into what happens)
> >
> >On the good news, just got back from a GREAT 10 days in Durango and
> >Silverton Colorado. Weather was fantastic, leaves were turning, and had a
> >good time Jeeping on the mountain 4x4 trails.
> >
> >Thank you,
> >Alan Johnson
> >87FC35
> >
> >
> >
>