start at the 12V positive lead going to the trailer. Using a test light or Ohm meter, make sure you have 12V going to the trailer. If you have a battery cut off switch, make sure it's in the correct position and if it is, cycle it.
If you installed the second battery, then you may have popped a reverse polarity fuse at the fuse panel when hooking up the leads. That fuse should be a 40A fuse separate from the row of fuses. If you installed the second battery are you sure you hooked positive to positive and negative to negative.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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