Grumpy_G

The battery switch needs to be on for traveling as well for the emergency braking to work. Generally leave it on unless the trailer is stored. Simple converter test: Read battery voltage with shore p… (View Post)

Hmm that certainly becomes interesting... I think the likelihood that you got two defective jacks is very small. Can you bench test the jack with a jumper pack or similar power source ? These things … (View Post)

The trailer frame may not have connection to 12V ground. If you have jumper cables connect the battery negative to a shiny bolt on the frame and see if it works then.  (View Post)

A number of possible causes: The USB adapter is defective, the 12V socket is not wired correctly or either one is designed so badly that it causes a short when plugging in (yes I've seen that). Step … (View Post)

No, it doesn't matter if the 12V supply comes from the converter or a battery. Given that the interior lights work at least part of the 12V system is working. Next step would be to check the DC fuse … (View Post)