I have a 96 altima that I have been having goofy head unit trouble with. For starters, I have installed at LEAST 100 head units in every different car imaginable. So I know what I am doing until now. I installed a kenwood cd player in the car about six months ago, two months after that it stop working. It blew the 10 amp fuse. I replaced the fuse and after a day it stop working again without blowing the fuse. When I tested it I found the neg. to be pos. and vice versa. It somehow turned the neg to be pos. I thought a bad player so I took an old clarion and installed it. It was fine for about 3 months then it stopped working. No fuse blew this time, however the head unit's display started working very dimly then brightly like a weak alternator was not giving it enough power. The charging system is fine though. Then it stop working completely. On the clarion I hardwired it to the battery with a 20 amp fuse on the wire and grounded it to the chassis. No amps, or anything else is hooked to the aux ports, just four speakers. This is weird and before I install my expensive head unit from the Camaro in it, I want to see what is going on before I ruin that too. Thanks in advance.

 

I don't know, but you might look around on this site www.installdr.com and see if there is anything that will help. They have some troubleshooting tips there.

 

did you have to hardwire the deck into the factory wiring? or did you use a harness? if you hardwired its possible you actually hooked the illumination/dimmer up as a power or ground.