Im currently installing an audio system in my 97 TJ. Ive had this problem in the past, however, just ran a wire to the (-) on my battery. However, I cannot afford 17ft of 4 GA wire at the moment. The problem is that when installing after market parts that require elec. , the chasis of my jeep wont ground the wire..
Maybe im just a little challenged, but can someone point me in the right direction.?!
I have two amps (four channel for the sound bars, and a mono for the subwoofer) installed on my 2001 TJ and I' connected the ground to the bolts that hold down the front seat brackets - no issues. They both fire up fine, and the sound is great! I will caution you to make sure that you run the power line to the amplifier away from the speaker wires - minimizes/eliminates the feedback.