The Trailer Goddess
and I 'tried' to come to the aid of a new found Egger (attended our Fall
Egg meet) this weekend. He is experiencing electrical
issues, some of which we were able to sort out, without getting 'down n dirty'!!
( a 1976??) was new to them last year. The old owner (apparently) told them that the trailer came with a converter(inverter??). In usage last season they (new owners) discovered the 12volt appliances fading more n more every weekend, ending now in a total 12V power loss. I believe he has communicated with the old owner and was told that the system SHOULD recharge while connected to the tow vehicle (running, not with vehicle shut off). The new owner has tried this idea a few times with NO luck. Our task Sunday was to find out whaddup?!?!
The new owner has said he has gone through the trailer very thoughly and NOT been able to find ANY signs of a converter/charger AT ALL. ( I suggested that IF he can find it that it may not be functioning and it might/should have a reset button OR at least an in line fuse, which MAY be blown) In my bag of testing supplys I had along, I had a portable 12V power supply which has (removeable) jumper cables with it. I applied this portable supply to the 'stale' battery
and the owner checked inside the egg for any signs of 'light'. He was rather surprised to find EVERYTHING 12V worked fine!!
So, we/I looked into the trailer to car connector (a round 7 pin, of which I have very LIMITED knowledge). The enclosed wiring looked odd somehow, but the owner says it works when connected to the tow vehicle.....so the 12V from the T.V. IS getting through to the trailer. Inside the plug, here is a little of what I saw. Firstly was a buildup of oxidization on all the connecting screws n wiring, which NEEDS to be addressed. This was NOT unexpected to me because of the maze of wiring going INTO the plug!! I noted too that the large center pin (which should have a small screw to hold the wire in place) was missing ANY wire and the small screw.
The trailer has electric brakes
which are (for NOW) not connected, as he has yet to connect (wire in) the controller to their new T.V.
My question(s) is/are, ....this center pin, Is it NOT for the GROUND wire?? Or is it for the onboard electric brake system?? ....AND for the electric brakes
, is there a + and a - wire running to the trailer wiriing plug? Obviously, if while searching, we/he cannot find a converter/inverter, there is NOT one. This trailer HAS had some modifications done to it by the old owner, and I guess this (these electrical
mods) is one of those things that MIGHTA been best dealt with by some one (a pro??) that knows more about what they are doing.
Seeing as how the battery
has sat (spent) fort almost a year, I have suggested FIRST giving the battery
a good charge, then taking the battery and having it load tested to ascertain its charge holding capability. IF it turns out to be less than standard a new battery SHOULD be ordered. Also in this order, I have suggested the new owner purchase a small battery maintainer and wire it into the battery (at the battery) and keeping it plugged in (to shore power) when the trailer is sitting idle. We have done this to our egg's 12V system and it works perfectly!!!