NO 12 Volt

[istumpy]

i have a 2006 Discovery 39S.
ihave NO 12 volts. on house. I just installed 4 new 6 volt batteries. when i ck them out to see if i have 12 volts it comes up 12.92 but the system in coach shows 7.2 volts. it shows 14.00 on chassis. what should i be looking for ?????? THKS IN ADVANCE FOR YOUR HELP

[Old-Biscuit]

Converter Reverse Polarity Fuses Blown.....IF battery cables were connected backwards even just for second the Reverse Polarity Fuses blow

Battery POS Cable...in-line Fuse (or resettable DC Circuit Breaker) blown/tripped
*should be close to battery on the POS Cable

[twinboat]

I think your house feed cable has landed on a 6 volt point. It will be a thinner one of the cables.

There are jumpers between each pair of 6 volt batteries. Should not be anything else on them.

Your inverter/charger is connected properly, thats charging fine. 7 volts is a charging voltage on a 6 volt battery.


Send a picture of your connections.

[andy29847]

It osulnds like you are not connected correctly. You should have 2 pairs of batteries. Each pair is connected in series to make 12v. The 2 pairs are then connected in parrallel to give more power (amps). The positive lead for the coach comes from one of the pair, the negative lead comes from the other pair.
The pairs have to be joined on the positive and negative side. The illustration shows the batteries in my coach. The green ones are the house batteries.

[istumpy]

THKS for all of the info. It help me find my challenge. I had put the house neg. on the wrong battery. Move the cable to the proper battery now life is good. THKS again