I wasn't paying attention

Hope the problem is as simple as a blown fuse, which is most likely the case. Can we chalk this "adventure" up to God's way of reminding us to always Pay Attention?

Look for blown fuses in the power distribution panel labeled REVERSE POLARITY. The older trailers usually had these two fuses off-set from the regular Dc fuses. My setup also has an IN-LINE fuse located real close to the battery install that would blow as well...

You can see the two large current fuses off-set to themself in this photo..


I dabbed each of my POSITIVE Dc cables with RED FINGERNAIL polish to keep me straight on which battery cables goes to the POSITIVE TERMINALS... Very easy to mess up with the RV trailer batteries that uses the same size terminal for both NEG and POS connections. The automotive industry uses a larger connector for the POSITIVE side...

Should be no harm done as fuses protect everything when this happens...

Roy Ken

2edgesword wrote:
There may be a fuse or circuit breaker in-line with the converter that blew/tripped. Check the documentation for the trailer and converter to detemine if this is the case. It may just be a matter of replacing a fuse or resetting a circuit breaker.

X2

Depending on your converter there may be one or 2 fuses in back of the converter. Screws may have to be loosened to remove them.

If you mean converter (120V AC to 12V DC) rather than inverter (12v DC to 120V AC), a fuse probably blew in the converter. Locate the fuse on the converter chassis and replace it. It will probably be the largest amperage fuse like 40A. There may be 2 of them. It is possible you damaged another 12V item (like the refrig control board, water heater control, etc) as the converter fuse(s) only protects the converter. Other devices may also have a reverse connection fuse which means you'd have to replace them too.

There may be a fuse or circuit breaker in-line with the converter that blew/tripped. Check the documentation for the trailer and converter to detemine if this is the case. It may just be a matter of replacing a fuse or resetting a circuit breaker.