Disconnected my heater from three wire nuts to be able to pull it out to repair. Forgot to mark wires to connect to. The heater has a blue labeled thermostat, another blue labeled +thermostat, a black marked -12vdc and a red marked +12vdc. The wires to connect these to are 1 white, 1 brown, and 1 blue. Which go to which wires???
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You need to measure which RV wire has DC Power....
RV Blue or RV Brown??
Voltmeter...Set to DC Volts
Red Probe on RV Blue...then Black Probe to RV White
Reading 12VDC?
No...
Then Red Probe on RV Brown and Black Probe on RV White
Reading 12VDC?
**one should test 12VDC + (DC Power from DC Dist Panel FUSED Source)
RV Blue wire......(If it is the 12VDC+ when tested)
The Furnace Red 12VDC+ and the Blue + thermostat should be connected to the RV Blue Wire
RV White Wire .... it should be Ground (12VDC -)
Furnace Black Wire connected to RV White Wire
RV Brown Wire....it should be other wire that comes from Thermostat
Furnace Blue Wire labeled thermostat should be connected to the RV Brown Wire
**If the RV Brown Wire showed 12VDC+ when tested then wire it with Furnace RED and Blue + Thermostat
RV White to Furnace Black
RV Blue to Blue Labeled Thermostat wire
Test/Measure WHICH RV Wire has the 12VDC+ BEFORE wire nutting ANY wires together
RV Blue or RV Brown
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Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31