The TC charges the batteries when plugged in but when driving it will not charge. I checked with mult meter and plugged in charges at 13.5 but when you start the truck does not charge at all, last year not a problem truck charged the batteries they never went below 12.4 when left all winter, (as mild winter we had here)does anyone know if there is a fused line or fuse at the fuse panel that runs from truck charging the house batteries I also checked the 7 way plug at the back of the truck it indicates power at the plug so that is not a problem.Thanks for any helpDave

The way you tell is to read the DC VOLTAGE across the battery terminals using a multimeter...When the SHORE POWER/GENERATOR is disconnected your batteries should read 12.6-7VDC if fully charged.When you plug in to shore power/Generator your battery terminals DC VOLTAGE should jump up to the 13.6VDC telling you the batteries are being charged.When you turn off shore power completely the battery terminals should drop back to the 12.6-7VDC showing they are fully charged. Then start your truck engine and the DC VOLTAGE on the battery terminal should go back up to the 13.6 VDC level depending what your truck alternator is putting out at that time...You have already done this part with shore power/generator connected but you probably need to unplug the shore power/generator completely then start your truck and see if that switches to 13.6VDC coming from your truck alternator system.Roy Ken

Already did the shore power disconect and started the truck no charge from truck, went for a 45 min. ride with heater on and the truck still would not charge batteries went down from 12.61 to 12.40Dave

I have a cable that plugs into the 7 pin on the truck and the other end plugs into the camper. If yours is the same you need to check power coming out of the cable after it is plugged into the truck and also make sure the connector/plug on the camper side is not corroded.

I'dcheck all the fuses in the camper and dig into the wiring on the back side of the plug inside the camper, see if the problem lies there. Wouldn't be surprised if you lost a fuse.

going to go check now, camper charged in the fall without problems, brand new so I don't think the plugs are corroded, sealed it so no mice problem in the winter, but going to check the camper end of plug to make sure I am getteing charge to there, post back later with resultsDave

charging system problem | Good Sam Community

13 Replies

zcookiemonstar
Explorer
Apr 02, 2016
I have a cable that plugs into the 7 pin on the truck and the other end plugs into the camper. If yours is the same you need to check power coming out of the cable after it is plugged into the truck and also make sure the connector/plug on the camper side is not corroded.
djg
Explorer
Apr 02, 2016
Already did the shore power disconect and started the truck no charge from truck, went for a 45 min. ride with heater on and the truck still would not charge batteries went down from 12.61 to 12.40

Dave
RoyB
Explorer II
Apr 02, 2016
The way you tell is to read the DC VOLTAGE across the battery terminals using a multimeter...

When the SHORE POWER/GENERATOR is disconnected your batteries should read 12.6-7VDC if fully charged.

When you plug in to shore power/Generator your battery terminals DC VOLTAGE should jump up to the 13.6VDC telling you the batteries are being charged.

When you turn off shore power completely the battery terminals should drop back to the 12.6-7VDC showing they are fully charged. Then start your truck engine and the DC VOLTAGE on the battery terminal should go back up to the 13.6 VDC level depending what your truck alternator is putting out at that time...

You have already done this part with shore power/generator connected but you probably need to unplug the shore power/generator completely then start your truck and see if that switches to 13.6VDC coming from your truck alternator system.

Roy Ken

Forum Discussion

charging system problem

13 Replies

About Travel Trailer Group

Related Content

Lithium Battery Charging System

Charging System

Battery Charging Problem UPDATE

Charging System Problem

Charging system