My question is would there be any problems if I up the amps on a fuse. For instance putting in a 10a or 15a fuse instead of a 7.5a. thank you for any input.

 

What are you uppin the fuse on?

 

...Tailights which also is connected to corner lights

 

Why do you want to up the fuse for the tailights?

 

A fuse is a protective device. It protects the wiring on the branch circuit which it serves. If Nissan put a 7.5 amp fuse on a circuit that means the wire on that circuit is sized to safely handle 7.5 amps. If you change the fuse to a higher rating you are defeating this safety mechanism. You would probably get away with it in the short term but not in the long term. You risk ending up with a "toasted" harness and a big repair bill.

 

with a cajun style interior. fuse was replaced with a larger fuse. devices ran too hot...cooked a wire harness..which caused an electrical fire behind his dash