Conversation Between F150xlt and remerryman

I HAVE A QUESTION ABOUT A 88 F-150 THAT I HOPE YOU CAN ANSEWER FOR ME.
THERE IS NO VOLTAGE AT THE #1 FUSE (BRAKE/HAZARD/SPEED CONTROL). ALL OTHER LIGHTS WORK. OWNERS MANUAL SAYS THERE IS A FUSE LINK AT THE STARTER RELAY FOUND THREE NOT SURE WHICH ONE BUT ALL SEEM IN TACK. TRYING TO TRACK DOWN THE HAZARD FLASHER, MANUAL SAYS IT IS BEHIND THE GLOVE BOX. ONLY THING I CAN FIND IS A THREE PRONG RELAY IS THAT IT?
THE PREVIOUS OWNER HAD A JUMPER RUNNING FROM THE #8 FUSE TO WHAT I BELIEVE TO BE THE CRUISE CONTROL BRAKE SENSOR ( JAMMED INTO ONE OF THE EXPOSSED BLADES OF 2 LIGHT GREEN WIRES ABOVE THE BRAKE PEDAL, NOT THE BRAKE SWITCH ITSELF) TRIED TO REHOOK RIG THE BRAKE LIGHT COMES ON BRIGHT BUT BLOWS THE FUSE.
MY QUESTION IS COULD A BAD HAZARD FLASHER EFFECT THE BRAKE LIGHTS OR SHOULD I TRY TO RUN A JUMPER FROM THE BATTERY TO THE #1 FUSE TO SEE IF I HAVE AN OPEN IN THE CIRCUIT TO SEE IF THAT WORKS (DONT WANT TO FRY ANYTHING)?

THANKS