Power going from fuse to brake switch on the pedal,but no power to the brake lights,,tail lights working fine,, earth wire in the boot has good grounding,,
Check first wirring is work properly, and check lamps are work properly. If not then change lamps.If works properly then check connectors, and paddle switches are work properly. If not then change the connector and paddle switches.
SOURCE: 2004 F150 Tail light problem
I would check your Auxiliary relay box. Check the R03 relay you might need to replace it. The Auxiliary relay box is located in the engine compartment (driver side)
SOURCE: No tail lights on 1991 Chevy Silverado. fuse is good
sounds like a broken wire in the harness. look around the bumper area,sometimes along the frame. may have to peel back some tape covering. also if you have a trailer harness look closely at those.
SOURCE: 1986 Toyota Pickup Instrument lights and tail lights out
Even though the relay is activated,I assumed you checked the out put?Also,You checked the voltage at the light sockets?With a meter,or test light ,check the fuse for the cluster lps,adjust them to dim,and to bright,the meter should act accordingly on the fuse.If it does not,replace the dimmer control,or head light switch,witch ever controls them.This may allow continuity to the tail lights as well.If the fuse is dead for the cluster lights,replacing the dimmer control,or head light switch will solve the problem,or,from another fuse ,supply voltage to the cluster lp fuse,one that is only hot with the key on,cause if you do this the dash lights will come on,every time you run the vehicle,day,or night.
SOURCE: Brake lights not working at tail lights but the
the upper brake light works differently than the outer lights. check your brake light switch by the brake pedal.It will have a plunger switch on it. The center brake lamp works off a power convertor instead off the brake light switch. The switch has a separate wire for that which is still working
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