Auxiliary battery

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Oct 19, 2011 | 10:16 AM

JoePa2

Thread Starter

Cross-Country

Joined: Oct 2011

Posts: 74

Likes: 10

From: Pennslvania

Auxiliary battery

I have a 1998 Ford Club Wagon - it has an auxiliary battery located under the van mounted to the frame - I need to get a new main battery - do I also have to get a new auxiliary battery too? - what is the purpose of this auxiliary battery anyway - is it just used to supply a trailer load - does it help start the van? - sure would appreciate any information about this extra battery - thanks in advance - Joe

Oct 21, 2011 | 11:03 AM

blageurt

Fleet Mechanic

Joined: May 2011

Posts: 1,414

Likes: 10

From: Thornhill , Ontario

You should always replace batteries in pairs...Is it a Diesel ? If not just get it Load tested just in case....

Oct 21, 2011 | 11:34 AM

joshofalltrades

Postmaster

Joined: Feb 2011

Posts: 3,560

Likes: 1

i don't know how its wired, as it was likely aftermarket. if its installed with a multi-battery isolater, then it was probably intended for running accessoreis (RV stuff, etc), or if its wired directly with the main battery, its involved in starting.