Trailer wiring

[bullheadstroker]

I have a 99 with the factory tow package. Lights, brakes and all work on my 5th wheel, but the batteries don't charge. Is there a fuse or something under the hood that I need to install to get thiss working? When dry camping, it would be nice to be able to charge the batteries a little by idling the truck awhile. Thanks.

[korterman1]

How old are the trailer batteries? Do you service your trlr batteries? Since trailers sit a lot it is not uncommon for these to drain completely, are you using duel 6 volt or 12 volt?
First check terminal connections hot lead and ground. These cables can also go bad over time, (corrosion) also might take batteries to a auto parts store and have a load/amp draw test done. My bet is you will have to buy new batteries.

[Jubilee]

Check your connector on the truck to see if you have power to the pos. contact there is a diagram molded into the cover of the connector to show the wiring. If you have power there(terminal in the 1 o'clock position) the problem is in your trailer if not then check your power distribution box under the hood. Consult your owner's manual to locate the fuse. It would be tow pos. or trailer pos. something like that. The pos. terminal on the connector should only have power with the ignition on. Hope this helps.

[bullheadstroker]

I'm running dual 6 volts. They are good. I should have been more clear, sorry. There is no power to the 12 volt terminal on the truck's recepticle. I'll check under the hood. Thanks

[flyguy03Tj]

There is a fuse for the hot line under the hood