ok, i know it was a stupid move but i have issues that are clouding my thinking. i was putting two new 6 volt batteries in for the coach and hooked them up backwards. i now have no 12 volt lighting and cannot crank my generator. any thoughts would be greatly appreciated. so you know i am not always stupid i have a son dying of cancer. much appreciation in advance.

What you need to do is disconnect the batteries and hook them up with + to - on both batteries. That will give you 12 volt output. Right now it appears that you have them connected + to + and - to - which gives you a 6 volt output..

If you actually hooked them up "backwards" most rv's have reverse polarity fuses near the battery or converter. Hopefully just a couple blown fuses.

rgatijnet1 wrote:What you need to do is disconnect the batteries and hook them up with + to - on both batteries. That will give you 12 volt output. Right now it appears that you have them connected + to + and - to - which gives you a 6 volt output.. no i have them hooked right, i momentarily hooked positive to ground then i realized what i done.

dockmasterdave wrote:If you actually hooked them up "backwards" most rv's have reverse polarity fuses near the battery or converter. Hopefully just a couple blown fuses.i failed to say it is a 2005 national dolphin on a w22 workhorse chassis. would you have any idea where that fuse would be and what size it is? i did hook them backwards positive to ground.

Look at the wiring right near the battery compartment for a fuse.The inverter may have it's own internal fuse/circuit breaker.

stupid move | Good Sam Community

wa8yxm
Explorer III
Aug 16, 2019
The disconnect has a fuse as well and there may be an additonal fuse or breaker

For that matter the Generator may have a fuse or two in the starter line as well.

Best outcome: Popped fuses and or tripped master battery breaker

Worst outcome. Fried a control board or 3
BarabooBob
Explorer III
Aug 16, 2019
Where do you live? Maybe someone could check this problem out for you?
ADAD437
Explorer
Aug 17, 2019
BarabooBob wrote:
Where do you live? Maybe someone could check this problem out for you?

at present i am in southern ind. i took it to a local family owned shop this morning but they can't get to it until monday. by the way very good shop. i need to go back to fl. where my son is. thank you all for the responses.
ADAD437
Explorer
Aug 17, 2019
wa8yxm wrote:
The disconnect has a fuse as well and there may be an additonal fuse or breaker

For that matter the Generator may have a fuse or two in the starter line as well.

Best outcome: Popped fuses and or tripped master battery breaker

Worst outcome. Fried a control board or 3

THANK YOU.
mike_brez
Explorer
Aug 17, 2019
ArchHoagland
Explorer
Aug 17, 2019
Show me somebody who doesn't make mistakes and I'll show you somebody who doesn't do anything.

I've made worse mistakes my friend but I'm not going to post them on here....too many. LOL

The good news is you'll never make that mistake again!
Branson_N_Tucso
Explorer II
Aug 17, 2019
Google 2005 National Dolphin main battery fuse. May help had veto and diagram information on location.
ADAD437
Explorer
Aug 24, 2019
well i only blew one board for 12 volt, thank god. it only cost 1200.00 but all is well. many thanks for all the response. i had a very good local truck repair shop take care of me. they work mostly on trucks but they are a great family owned shop. PAPPY'S TRUCK AND TRAILER, CLARKSVILLE,IND.
yamerhammer1
Explorer
Aug 24, 2019
Great that you got it fixed. Safe travels to Florida

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