Rear wipers won't turn off even when tahoe is off

dsumrow1

I have a 01 tahoe and ever since my boyfriend put speakers and an amp in, my run lights and rear windshield wipers will NOT turn off even when the ignition is off causing it to kill my battery. Any ideas what It could be or what to have checked?

0patience

Somewhere, the power is backfeeding from what ever was installed and powering those circuits. Usually it is because someone tied in a ground improperly.
You'll have to check the wiring to the amp. More than likely, it is improperly grounded or some wires are hooked up wrong.