Your common issue seems to be with the emergency flasher. I would be
checking out that switch for a bad connection. The hazards and brake
lights are on the same fuse likely so are on the same wiring circuit.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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papadad wrote:
>
> 1976 Ford F150 pickup truck is having rear right brake light problem.
> The rear right brake light does not come on during braking. it also
> does not come on during hazard flasher use.
>
> 1. Rear, right and left RUNNING lights work fine.
> 2. Rear, right and left TURN signals work fine.
> 3. Rear LEFT brake light works fine
> 4. Rear RIGHT brake light does NOT work
> 5. Hazard lights work EXCEPT for RIGHT...which does NOT light up.
>
> I have changed bulbs, flashers, and tested the socket and wiring up to
> the connector under the tailgate and the bulbs etc are fine. Since
> both directionals are working, and the directionals use the SAME
> filament as the brake, I know it is something else.
>
> Any ideas? How to chase down this gremlin. Spent all day
> cutting/splicing/trying to islolate the problem to no avail.
>
> Any ford techs on here can help?