could be - best to open it up and see if there's a wire that got pinched and opens or shorts with movement - could have to do with the wiring from the brake light switch to the column too - also make real sure you have good grounding from the light buckets to the bed and bed to frame, that's the most common problem

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot