How do you replace a brake light relay switch on a Suzuki XL7?
There is no relay in the brake light circuit. There is a fuse .
The only way they turn on and off is by the brake light switch that
is located above the brake pedal on the steering column.
There are 2 relays built into the under hood fuse block (PCB -
printed circuit board). One for brake lights and the other is for
the horn. To replace relay you change the fuse block.