03 chevy impala alarm problems

I installed a alarm / keyless entry in a 2003 chevy impala. This is not the first one that i have done. but this is the first one that has givine me so name problems: the costomer returnred about 3 months later stating that there was a clicking sound comeing from the fuse boxes, the horn windsheild wipers, turn signal, and brakes stop work except for the thrid brake light, after looking the car over it seems that every time u hear the clicking sound the reverse light flashed like strobes. i am stuck can anyone help.L67 Master (GM 3.8 SC)

Disconnect the brain and or wiring and see if the problem continues. if so, it may be nothing to do with your install. further investigation will tell after that, but, thats your first step. take out everything you did first.

I pulled everything out i guess i have to wait a day or so to see if the bcm resets its self L67 Master (GM 3.8 SC)