Only headlights turn on.. That happened after installin aftermarket stereo.. Where should I start trouble shooting.. Which fuses should I check out ?thanks.

 

It should say on the cover of the fuse box.

 

What year? Who did the install? Trim level? (they may not all be relevant, but it may help someone answer this question.)

 

Look at any fuses that are listed as being a part of the headlight or turn signal system. Don't just look at them in the fuse box. Pull them out at LEAST. Testing them with a DMM for ohms is the best way. I've seen fuses break on the edge, where the plastic is too thick to really see that they've popped. That was fun troubleshooting that

 

Its an 05 350z base model, a coworker did...

 

It would reboot everytime I would turn on head lights until I disconeccted the illm cable(orange)