SomethingIrreverent t1_jcq7fbc wrote
You shouldn't need a charge controller - the truck's alternator handles that, limiting the supplied voltage to 14V.
You might want to install a diode to prevent the trailer battery back-feeding the truck.
joelaw9 OP t1_jcqfj91 wrote
Cool. So the schema should be 7way AUX -> diode -> Battery terminal -> Battery terminal -> trailer frame correct?
SomethingIrreverent t1_jcqgspa wrote
I think you have it right, assuming you're not connecting the two terminals together :)
Getting the right polarity on the diode may present a small challenge.
joelaw9 OP t1_jcqgwlj wrote
Excellent, thank you for your help.
crankshaft123 t1_jcr09gy wrote
You typically use an isolation solenoid instead of a diode.
SomethingIrreverent t1_jcr6iuq wrote
Sounds reasonable.
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