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Yes i was thinking the same thing but both tested fine and its been 2 days now no message and switches working fine so i dont know.The main is 3 yrs old so its due but still cranks fine and tests fine

i was thinking that but the connections were never removed or worked on since i owned it but it might have been that.

im due to replace the main its 3 yrs old the aux batter is a year old both tested fine and by unhooking both to test the message now disappeared its weird.

i would think the same thing but why since i unhooked both batteries and hooked them back up did the message now disappear and the aux switches work fine it makes no sense.

Can someone help me.Ive been getting aux switches unavailable message and when i drive no more than a city block the aux switches work but as soon as you turn the truck off the message comes back.I tested both batteries they are 12.49 in cool weather.The aux battery is a year old the main 3 yrs...