Lighting problem

That matches what I have. I just wanted to make sure the brake lights worked so I used jumper wires and another battery to the brown and dark green wires. The brake lights light up. The 18w wire is the one ive been testing. Ill have to test the hazard switch wires for continuity once and see what I get. The hazard switch would cause the 18W wire from the brake light switch to go dead when plugged in and the pedal depressed?