Battery Charging with Mopar Flat Tow Harness

dgreen1069

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Has anyone added a battery charging system to their Jeep that has the Mopar Flat-Tow harness? I'm looking to add the RVi Towed Battery Charger to my rig and am looking for some insight on anyone who has already done the same.

Does the Mopar harness have the wire for the 12v power coming from the coach? If the wiring is there, where does it terminate? My Jeep is my wife's primary vehicle and I haven't had a chance to look at it yet. I figured someone here may have already done this which would save me some time.





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huntinjeep

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Has anyone added a battery charging system to their Jeep that has the Mopar Flat-Tow harness? I'm looking to add the RVi Towed Battery Charger to my rig and am looking for some insight on anyone who has already done the same.

Does the Mopar harness have the wire for the 12v power coming from the coach? If the wiring is there, where does it terminate? My Jeep is my wife's primary vehicle and I haven't had a chance to look at it yet. I figured someone here may have already done this which would save me some time.
I have not installed the flat tow wire harness yet, just ordered it today after doing some research. We have flat towed a 19 JLUR closet to 10,000 miles using the harness that you flip the switch and have to cut into the Jeeps harness. We just bought a 20 JLUR and was not going to use the same harness because I did not like cutting into the harness on the last Jeep. We had to add the 12 volt charger to that kit as well and it just plug into the #4 wire on connecting 7 wire harness. Since the Mopar harness dose not have a 12volt charger with it and has the complete 7 wire harness that plugs into the tow rig you just need to figure out what wire is the #4 wire on the Mopar connector on the front bumper. It will either be pin #4 or #8.

I know you ask this question over a month ago so hopefully have figured it out but if not let me know and I can help you when I get mine deliver it a week or so.

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kosinar

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I have not installed the flat tow wire harness yet, just ordered it today after doing some research. We have flat towed a 19 JLUR closet to 10,000 miles using the harness that you flip the switch and have to cut into the Jeeps harness. We just bought a 20 JLUR and was not going to use the same harness because I did not like cutting into the harness on the last Jeep. We had to add the 12 volt charger to that kit as well and it just plug into the #4 wire on connecting 7 wire harness. Since the Mopar harness dose not have a 12volt charger with it and has the complete 7 wire harness that plugs into the tow rig you just need to figure out what wire is the #4 wire on the Mopar connector on the front bumper. It will either be pin #4 or #8.

I know you ask this question over a month ago so hopefully have figured it out but if not let me know and I can help you when I get mine deliver it a week or so.

B4EAFA13-6785-49DF-97D0-77088F8844AB.jpeg
I am trying to solve the same issue. Umbilical cord that comes with Mopar harness has 7 conductors. Receptacle connector of the harness has only 6. I will have no problem finding 12V conductor on umbilical word or add one if I can find part number for connector and buy male and female pins that goes in it. There are no part numbers on male or female connector on that harness.
 

huntinjeep

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Can you post a picture of the pins? I get my wiring stuff at prowireusa.com They have a lot of the pins for different connectors. The expensive part is the crimper. I am thinking about not using the connector that the 7 wire plug goes into and using a standard small round 7 wire plug.
 

kosinar

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Can you post a picture of the pins? I get my wiring stuff at prowireusa.com They have a lot of the pins for different connectors. The expensive part is the crimper. I am thinking about not using the connector that the 7 wire plug goes into and using a standard small round 7 wire plug.
Umbilical cable that come with Mopar wire harness has standard 7 pin connector on one end and that plugs into RV 7 pin receiver. On other end is connector with 7 female pins. Connector with 6 male pins Is harness connector you will install on the Jeep. See if you can figure out pin part numbers.

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huntinjeep

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The Mopar flat tow harness was just delivered and after looking at it (I have not installed it) it looks like the larger black wire is the power wire (12 volt) that comes from the tow vehicle. This the part of the harness that goes from the Jeep bumper to next to the Jeep battery where the fuses are but in (4 10 amp). This would be the wire that you would tap into to add a battery charger for the Jeep battery. Hope this helps.
 

kosinar

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The Mopar flat tow harness was just delivered and after looking at it (I have not installed it) it looks like the larger black wire is the power wire (12 volt) that comes from the tow vehicle. This the part of the harness that goes from the Jeep bumper to next to the Jeep battery where the fuses are but in (4 10 amp). This would be the wire that you would tap into to add a battery charger for the Jeep battery. Hope this helps.
I want to make sure that I understand what you mean. "This the part of the harness that goes from the Jeep bumper to next to the Jeep battery where the fuses are but in (4 10 amp). ". Black wire from Jeep bumper connector goes to fuse #4 10amp in fuse box next to the battery?
 

kosinar

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I want to make sure that I understand what you mean. "This the part of the harness that goes from the Jeep bumper to next to the Jeep battery where the fuses are but in (4 10 amp). ". Black wire from Jeep bumper connector goes to fuse #4 10amp in fuse box next to the battery?
Never mind. I understand now. I found picture of the wire harness and see 4 fuse box you are talking about. Thank you.
 

huntinjeep

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Sorry it took to long to get back to you. I looks like it is the larger black wire through out the complete harness. Even the black/white wire is larger going to the tail lights. That is the one that should have 12 volt power for the battery charger. The nice thing is the fuse box for the harness is mounted right next to the battery so there wont be much wire needed to hook up the charger.
 

kosinar

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Sorry it took to long to get back to you. I looks like it is the larger black wire through out the complete harness. Even the black/white wire is larger going to the tail lights. That is the one that should have 12 volt power for the battery charger. The nice thing is the fuse box for the harness is mounted right next to the battery so there wont be much wire needed to hook up the charger.
I got RVi in tow charger and I installed it yesterday. I did tap into black wire in 4 fuse box you mentioned. I used fuse splitter. Had to notch lip of the box lid. It fits pretty good and box is well sealed. Did not have the chance to test it with RV but Jeep connection of RVi is showing correct voltage.
 

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