Charging Casita Battery From Towing Vehicle
Posted 18 March 2016 - 04:21 PM
Posted 18 March 2016 - 04:23 PM
Posted 18 March 2016 - 05:18 PM
Here's what the connections should be.
It's the black wire 12vdc vehicle side you need to make sure you have voltage there when tow vehicle is running. (Key on) If it's good then go back and check the voltage at the battery while tow vehicle is running. You should see 13vdc to 14vdc range. See what the difference is between voltage at battery when tow vehicle is running and when it's not. If there is no difference check the auto reset circuit breaker that is mounted to battery box. Access it through the bench seat inside your trailer. That might be a good place to start actually. Let us know what you find. Notice ground is a white wire.
Edited by Wally Z, 18 March 2016 - 05:20 PM.
2014 17' Casita SD
Posted 18 March 2016 - 11:28 PM
Follow Wally z's good advice. If there is no power at the hot wire on the tow vehicle the newer tow vehicles have a fuse that must be installed under the hood in the fuse block to activate the towed vehicle charging system.
Good time to get that multimeter out and test that black wire
Joe & Linda
Dodge Ram 4x4
Posted 19 March 2016 - 08:00 AM
New tow vehicle......
When I bought my Tacoma new even though it had the manufacturers tow package, the dealer had to plug a relay into the fuse box for that electrical to work. Maybe a 30 second task.
The relay turns off with the ignition so the trailer doesn't drain the tow vehicle battery when parked.
- Joe Z likes this
ex-owner LD17, Escape 21 now
2013 Tacoma V6 4dr 4wd long bed
Need a widget to hold your stuff?
Don't drill holes!
Posted 19 March 2016 - 01:10 PM
Thank yall so much for your help. Here is what happened.
First checked fuse. No fuse. Replaced fuse. Hooray for that information. Thanks.
2. Unplugged Casita and turned on lots of stuff and let the battery run down to 11ish.
3. Checked voltage with towing vehicle on and running.
Interestingly enough no voltage to 12v power, however there was voltage to right turn and stop, brake controller Output but not to tail and Running lights, reverse lights, or left turn and stop. All the lights were working and the emergency lights. No one dropped by while I did this so I could not see the reverse lights or stop lights.
4. Connected towing vehicle to Casita and turned on the towing vehicle lights and left it running in park and everything worked (except of course I could not check stop and reverse lights . The battery began charging and is up to 12.3.
5. could not find the auto reset circuit breaker. Enclosed is a photo (hopefully I'll figure out how to do that).
I have not gone directly to the wires. I tested the metal prongs where I plug in the Casita.
I still think something is wrong. Do yall?
Is this the auto reset circuit breaker?
I'm not sure how to insert a picture. The picture shows on the preview but only shows attachment here.
Posted 19 March 2016 - 04:22 PM
All you should be concerned with right now is that black hot wire..... unplug the casita and start the tow vehicle ... now test the black hot wire on the tow vehicle and ground the tester to one of the bumper bolts and see if it registers 13+ volts while running. If yes then plug in the casita and go back by the battery and test the input on top of the battery and the voltage reading there should be very close to that reading you got at the rear of the tow vehicle while running.
You can also test that inline fuse you show in the picture...... one side is "In" voltage and the other side is "Out" voltage..... if they are the same that inline fuse is working. If not it's shot.
Not sure how old your battery is but that could not be taking a charge and an inexpensive cell tester "Hydrometer" will tell you the battery condition
That's your next step
Joe & Linda
Dodge Ram 4x4
Posted 20 March 2016 - 05:43 AM
Something I noticed the last time I connected the electrical hook-up from the Casita to my tow vehicle is that in spite of the "tongue in groove" connection to make sure your wires are connected to the right ones between the two vehicles, if I wasn't paying attention to what I was doing I could get the two to connect being 1/2" off so the connections weren't lined up correctly. This would have negatively impacted the signal lights, etc. but it is something I discovered about myself recently. Now I am much more careful to make sure that they connection is lined up correctly before departing.
Posted 20 March 2016 - 06:45 AM
- Wally Z likes this
Posted 20 March 2016 - 07:01 AM
Posted 20 March 2016 - 08:35 AM
The 4 pin shouldn't be a problem for the 7 pin assuming it was wired properly. The 7 pin uses 4 of the same wires as the 4 pin for turn signals and brake lights. The 7 pin has the 12vdc for battery charging, backup light, and trailer brake wires in addition. When I replaced my tow vehicle 7 pin I got one that has LED test lights as part of the plug. Before that I had a 7 pin tester that would plug in for quick and easy checks of the TV side of the connection.
A 12vdc circuit tester like this is very handy also. Great for 12vdc easy trouble shooting. You just hook up alligator clip to ground and touch probe to 12vdc connections/wires. It will light up if voltage is there.
Edited by Wally Z, 20 March 2016 - 08:50 AM.
2014 17' Casita SD
Posted 22 March 2016 - 03:07 PM