I have no brake lights on my 69 Cougar. Everything else works: lights, turn signals, flashers. I have 12V at the switch, and have jumped across the plug, and still no brake lights. Any thoughts and ideas would be appreciated on this issue. Thanks
On the 69 and 70 Cougars, the brake lights are activated with power from the turn signal switch and the brake light switch. Check the wires at the sequencer with the brakes applied as the left inner brake light is powered by circuit # 442A (Green-Orange) and the right inner brake light circuit #445A (Orange-Blue) are fed from the turn signal switch. Also check circuit #511 (Green) as this provides the power to the Sequential unit from the brake light switch.
If you do not have voltage on these wires when braking, then check the output of the turn signal switch for the 442 and 445 circuits and the brake light switch for the power on 511. If you do not have power on 442 and 445 from the turn signal switch, then check the circuit 511A (Green) at the turn signal switch as this is the input power from the brake light switch. Note the output of the brake light switch feeds both the turn signal switch and to the sequential box.
Hope this helps
Coach Jack
Coach Jack, thanks for the information. Just to reiterate, EVERYTHING else is working except the brake lights. I removed the plug from the brake switch, and placed a jumper in the plug to eliminate the switch, still no brake lights. I left the jumper in place and checked for voltage at the sequencer for circuits 442A and 445A, the best I can tell, no voltage. I then checked circuits 442 and 445 and again could not find voltage. I know I have voltage in circuit 511 at the brake switch plug (that is why I left the jumper in place to check the others).
From this problem determination, is it the turn signal switch that is the issue?
Thanks