Battery cable rewire

[hustjona]

I want to replace my battery cables with 2 guage wire. The ground wire is no problem. My question is the positive. Can I run a heavier wire from the alternator to the positive post on the battery?

 

[DaveT]

Yes, you need to tap into the stock alternator fuse/relay in the fuse box. Not sure where it is on a 2G but in a 1G, if you look at the outside edge of the large fuse box, you will see 2 terminals, 1 going to the battery and the other going to the wiring harness, ultimately to the alternator. Just run your wire from the alternator to 1 terminal (make sure you have the polarity correct with respect to the stock alternator wire) and then from the other terminal to the battery.

DaveT
92GSX

 

[steve]

The key message here is don't bypass the alternator fuse in the process.
Using 2 gauge to the alternator is over kill since the wire isn't that long unless you have a alternator putting out > 150A. A 4 or 6 gauge wire would be fine with normal DSM alternators. Running a ground wire to the alternator bracket wouldn't hurt.

Steve