No power except microwave when plugged into shore power

The rubber mat burned the coil up and it's blowing the protection fuse. Here is a $58 replacement and says it's a latching relay... only requires a short pulse of power to activate. Connect the two big cables either side together and you will be fine until you can replace it.

You have two posts going with the same subject matter but on two different forums. Might be better if you can get the moderator to combine them into one. That way you won't be posting pictures twice or answering the same question twice.

In my opinion, you need to start at the batteries and follow the 12v until it's there any more. Whatever is causing the problem will be between the last two measurements.

Good luck

Ron

To remove just the left cable I would not disconnect the batteries. Just make sure you do not hit the metal mounting bracket while disconnecting. If you need to connect it to the right connection then yes I would disconnect both negative terminals on the batteries because on the right side it's easier to hit something if you are not careful. I would not disconnect the batteries but I work on stuff like this all of the time and learned a long time ago how hot a wrench can get when you short it.

It is a '05 horse trailer with factory installed living quarters in it.The brand on relay is kib L9806.

Just to be sure I should disconnect the negative off my 2-12 volt batteries and not the negative on the relay switch correct??

I am thinking from your description that the coil is bad on the solenoid.

The pictures really help. Otherwise it would be good to know what model year your RV is, and brand. If before 1995, then it is likely that you have a 'converter' that disconnects the coach battery from the lights while plugged in, but this looks a little more modern, with a battery charger that is electronically voltage regulated, and much better.

This relay probably is energized to turn it on or off, otherwise is not using any power. Check with your manufacture, or the place you bought it for a replacement relay. Expect it to cost $50 - $125. It is pretty special. Most solenoids consume power while they are on, and could drain the battery pretty quick.

Good luck,

Fred.

Here's a pic... 5amp fuse on left is the one that blows when trying the battery disconnect switch.

Disconnect the large black wire on the left in the picture above... Does the fuse still blow? If so the coil is shorted and you need a new solinoid. In the meantime you can fasten it to the cable on the right... Best done with the battery cables off the negative terminals on your batteries.

If it does not blow then reconnect and I would disconnect the large 12 V wire feeding your 12V converter and see if you stop blowing the fuse. If so, you have a bad 12V converter.

Here is a pic...

Bad battery?
Do you actually have good 120VAC at the pedstal? How about at the converter? You possibly have one dead leg if this is a 50A system.