How to Wire a Two Battery Universal Isolator # DW08771 on 2002 Ford E450

Updated 09/24/2014 | Published 09/23/2014

Question:

I have a 2002 ford E450 series 7.3 powerstoke turbo diesel bus with wheelchair lift. there is 1 battery in front and 2 marine batteries in the back with a shut off swicth next to the marine batteries . how do i install this isolator the right way.

asked by: Dale W

Expert Reply:

As long as your two marine batteries are wired parallel and are essentially one battery you will wire the Sure Power Two Battery Universal Isolator, # DW08771, that you referenced as follows: The A post will go to the alternator output. The number 1 post will go to the vehicle main battery positive post. And the number 2 post will go to the auxiliary battery through a circuit breaker to the positive battery post.

expert reply by: Chris O