12V relay?

[trlrboy]

I put in a new battery, fully charged but I'm not getting any power inside the trailer. Is there a resettable 12V relay that I'm missing? All the fuses seem OK.

[HamRad]

Trlrboy,
Yes. There should be a relay somewhere inline near the battery. Also don't forget to check the battery disconnect switch. Good luck. Dennis

[DQDick]

What Dennis said. Could be either. For me it was the battery disconnect. Not only is it easy to forget, but the way it's labeled is confusing, at least for me.

[bncinwv]

It is not just confusing for you Dick, I still think it is labelled backwards. The only reliable check that I have come up with is to turn the DC light on in the convenience center. If it comes on, switch is in proper position! Simple check!
bingo

[hookman]

There is a 50 amp breaker that has a lead going back through the hole behind the battery that all your wires come through it feeds the 12 volt panel in the coach. I just replaced mine 2 months ago.

[trlrboy]

I don't see a breaker anywhere near the battery or where the wires go through the hole.

[bncinwv]

It does not look like a breaker, it is an auto-reset breaker that looks like a small silver box on the back wall of the battery compartment. You can disconnect it and/or bypass it to see if it is faulty. Silly question, but you did check the battery disconnect switch, correct?
Bingo

[trlrboy]

Bingo... thanks for asking about the disconnect. I've tried it both ways and still nothing. I'm going to post a couple of pictures of my battery compartment. No silver box that I can see.

[bncinwv]

A little different rig (3750) but hopefully this will give you a start on what to look for. If I remember correctly, the two auto-reset breakers are behind the red covers on the back wall:



Hope this helps,

Bingo

[trlrboy]

Here's what my battery compartment looks like.... can anyone point out the relay?

[bncinwv]

See previous post, the red covers are on top of the auto-reset breakers.
Bingo

[trlrboy]

OK, I pulled off the red covers and there appears to be a relay behind each one with the wires attached. How do these reset?

[bncinwv]

They are internal. You can bypass or jumper the breakers to see if they are bad. There are no visible external switches, etc.
Bingo

[trlrboy]

This is a bit beyond what I think I can do. I don't have any idea how to bypass or jumper the breakers.

[bncinwv]

If it is beyond what you think you can do, then time to let the "experts" investigate it. The more I read your posts regarding the 12v and the AC, I am beginning to think that all of this is related somehow to a voltage surge or spike that hit your rig. The EMS has surge protection up to a point, then it becomes sacrificial. A lightning strike nearby, for instance could cause the EMS to bite the dust, it should still protect the rig but that is dependent upon whether the surge was great enough to bypass the EMS system altogether. I am confused as to how this would impact the DC system in the manner in which you have stated unless somehow the converter is involved. You may be correct in your statement to let the dealer troubleshoot this since you do have the extended service plan which should cover all electrical and battery systems. I would be very interested in what they find if you do go that route. This has went beyond my level of limited knowledge. If you want to get more detailed advice, I would suggest you PM Jim Fischer (NCFischers), whom I consider to be our resident electrical guru, (or at least mine). Sorry I could not help more.
Bingo

[CBTraveler]

The breakers automatically reset a few minutes after they trip. If you are still not getting power through them it might mean that there is a fault somewhere in the system and they tripped again after you replaced the battery. If you have a DC voltmeter, check the voltage going into the breaker ( from the wire coming from the battery) and the wire going out of the breaker to the trailer panel.

If you haven't worked with batteries before please be very careful with any metal tools around the breaker and around the batteries. One of my co-workers managed to have his ring finger bridge two DC voltage terminals in a battery backup UPS on our production line. We saved the chassis with the melted gold splattered on it as a reminder to the production team to be very careful around battery sources.