Forum Discussion
road-runner
Dec 17, 2018Explorer III
If they are 6 volt batteries, the series jumper could have been hooked positive-to-positive, or negative-to-negative, in which case it's possible no harm was done. If you have an automatic battery interconnect as some Fleetwood models do, do not start the engine until this issue is fixed. A lot of damage could be done when the interconnect kicks in.
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