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Old 12-04-2022, 07:18 AM   #1
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1994 Ford Econoline Factory 2nd Battery

Does anybody know what the stock 2nd battery (under the hood) does? It looks like it is dedicated to trailer power. It seems strange considering my van does not have a receiver hitch. I would like to remove it to allow room to mount my air compressor. I already have lithium house batteries and a good start battery, so Im covered there.


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Old 12-04-2022, 08:25 AM   #2
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2nd starting battery? The diesels have 2, one under hood and one mounted under chassis.

'03 Ford E350 7.3L Diesel
(de)SMB'd Custom RB-50
Quigley 4X4 w/Deavers & Agile Offroad's R.I.P. package
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Old 12-04-2022, 09:08 AM   #3
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A 2nd Aux battery was optional on gas vans. This was used for both the trailer tow package, or to power the body-builder accessory circuits inside the van.

If you don't need it, Ford had a jumper wire which redirect the accessory circuits back to the starting battery. If you just leave things as-is, your accessory circuits will all be running through the aux battery charge relay, and eventually that will probably fail.
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