Reply With QuoteYou need to trace the power wires to see where they go. The HDS owners or install manual have diagrams on how to wire them.
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Found the unit and a junction box, pic attached. I also found a stray yellow wire loose in the bottom. I have 2 switches on my dash, 1 factory and 1 aftermarket. Factory isn’t hooked to anything, other switch appears to have wires similar to the AT module so I thought that was the switch, especially when I found a similar set of wires unhooked in the rear compartment with the batteries. I hooked them to starting battery and still nothing. I’m going to check the in line fuse and check to see if I have a trigger wire. I also added a pick of a loose red wire under the dash that I don’t know about either.
S10CHEVY LIKED above post
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You need to trace the power wires to see where they go. The HDS owners or install manual have diagrams on how to wire them.
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Chase the ones at the AT or the ones I found near the battery?Originally Posted by justinp61
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Yes, AT.
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Does it power up?
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No, when I have all the power on and everything else is working then it’s still off. I have a HDS 7 on the dash and a HDS 12 on the front bow and they have power but there are no lights on the AT. Do people usually run the AT from the cranking battery or add another battery?
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Some use a dedicated house battery for nothing but their electronics.
My advice is to chase the power cord for the AT box and see where it goes, there are multiple ways to wire it.
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