Grumpy_G

One thing that sticks out is that for several days the min battery voltage is zero. This means the battery was fully discharged and turned itself off. As you discovered, voltage is not a good indicat… (View Post)

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)