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Yep, process of elimination, it would appear ...
Curious that they don't make life easier by labelling, or else providing clear instructions. The manual reads more like a legal disclaimer than any kind of useful owner's guide.
Thanks again your time and patience with this. Much appreciated.
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2011 Alpine 3500RE
2008 Ford F-350 Lariat Crew Cab, 6.4 Diesel, 4X4 Off-Road Package, Trailer Towing Package
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