Where is the 15 pin connector for the back up lights? It is part 24/15 in the Haynes manual.

I HAVE A 93 850 GLT AND WHENEVER I APPLY THE BRAKES, VIBRATION OCCURS. ALSO THE ABS LIGHT STAYS ON. HOW DOES ONE KNOW WHEN THE CAR IS IN ABS MODE? IS THE CAR ALWAYS IN ABS MODE? I HAVE CHANGED THE FRONT ROTORS, THE PADS ARE GOOD WITH LOTS OF MEAT LEFT SO I LEFT THEM ALONE. HAVE NOT CHECKED THE REARS...