need help with ecoboost big 3 upgrade
#3
I'd like to help, but not sure what the big 3 wiring upgrade is. Also do you have an off road package or no? That will make a difference regarding upgrade.
#4
Yeah I have an fx4 2012 big three is basically a new wire from alternator positive to battery positive, new grounds from battery to chasis and alternator to chasis. I believe the fx4 came with the off road package, thanks for any help just looking to find the best way to get to the alternator