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2025 Ranger 6G - 4-Wheel Flat Towing behind RVs - YES!
songkajai
Well-Known Member
I went out and took some pictures at night! The bottom and side markers are taillights, the top C is the brake and turn signal as seen in the last picture.
Bills_Raptor
Member
Finally did this with songkajai’s help. For those planning please know roadmasters & ford tolerances for alignment are horrible and will require creativity/modification. That said its done and looks good. If anyone needs install pics let me know. Also found these cheap rubber plugs on amazon.
unsavory
Active Member
I'll add the diode install to my wish list, I had the plug n play curt harness installed and towed a few thousand miles this summer. When I was connecting and setting up each time for flat tow, hitting the brakes on the RR would backfeed and illuminate the lights on the truck camper.
songkajai
Well-Known Member
Working with BIlls_Raptor we have discovered issues with the Curt Harnesses.
Mine worked but his did not! Reviewing everything we found although they are the exact model both from Amazon they are not the same!
Suspect this is the issues a few others have reported as well.
The taillight is wrong on some harnesses.
Here are the pictures of both, you can see that in his ( not working) the brown wire is in the second pin. Mine that does work has the wire on the forth pin, holding it up, like the first picture. Will try to get a picture at the same angle to make it easier to see!
The green wire also looks wrong, will check again.
If anyone else has this harness, please post pictures.
Mine worked but his did not! Reviewing everything we found although they are the exact model both from Amazon they are not the same!
Suspect this is the issues a few others have reported as well.
The taillight is wrong on some harnesses.
Here are the pictures of both, you can see that in his ( not working) the brown wire is in the second pin. Mine that does work has the wire on the forth pin, holding it up, like the first picture. Will try to get a picture at the same angle to make it easier to see!
The green wire also looks wrong, will check again.
If anyone else has this harness, please post pictures.
Last edited:
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RoughRider
Member
Great idea! BTW, we trimmed back those chain attachment points and drilled new holes.Finally did this with songkajai’s help. For those planning please know roadmasters & ford tolerances for alignment are horrible and will require creativity/modification. That said its done and looks good. If anyone needs install pics let me know. Also found these cheap rubber plugs on amazon.
songkajai
Well-Known Member
Yes, they stick out much too far!
I took and bent them way down, that helped a lot from getting kneecapped!
What did you do about the crap spacers and the top bolts?
RoughRider
Member
Took a piece of scrap iron an drilled holes for the spacers and used grade 8 hardware that fit in the existing hole.
songkajai
Well-Known Member
Exactly!
I did the same as removing most of the stuff they wanted you to remove was for drill the top holes out.
I landed up finding some metric stainless used for that with hacking the frame drilling it out for more rust!
Also changed the bolt to metric for the side arm brackets, not drilling again, that is pretty useless any!
The bolt that come out of the shutter fit to hold the bracket for the break-away switch and plug.
Bolts they give to install the shutter back are also complete crap!
Did you find this tread before or after you installed?
Oh, and what did you do for lights?
I did the same as removing most of the stuff they wanted you to remove was for drill the top holes out.
I landed up finding some metric stainless used for that with hacking the frame drilling it out for more rust!
Also changed the bolt to metric for the side arm brackets, not drilling again, that is pretty useless any!
The bolt that come out of the shutter fit to hold the bracket for the break-away switch and plug.
Bolts they give to install the shutter back are also complete crap!
Did you find this tread before or after you installed?
Oh, and what did you do for lights?
RoughRider
Member
Some of it before, and just peeking back in. It was great for helpful info for sure!
https://www.amazon.com/dp/B0BRNZG9HL?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1
https://www.amazon.com/dp/B0BRNZG9HL?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1
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songkajai
Well-Known Member
Great the Curt harness I talked about earlier.
Seems yours worked as did mine. Several other people have had issues. Looking back at this thread you probably see we found factory issues with some of the Curt harnesses made wrong.
People have been really frustrated with it not knowing why.
Others that might find this tread and use that harness, be sure it is made correctly and plug in before you install it to be sure it works!
You might have also noticed it seems it does not have back feed diodes going back to the tow vehicle. Have not seen any reports of causing issue but easy to correct by adding a couple simple $2 diodes. You can find the listing at Amazon above in the posts.
Best place I found to install them is inside the boot, back side of the Pollack connector.
Seems yours worked as did mine. Several other people have had issues. Looking back at this thread you probably see we found factory issues with some of the Curt harnesses made wrong.
People have been really frustrated with it not knowing why.
Others that might find this tread and use that harness, be sure it is made correctly and plug in before you install it to be sure it works!
You might have also noticed it seems it does not have back feed diodes going back to the tow vehicle. Have not seen any reports of causing issue but easy to correct by adding a couple simple $2 diodes. You can find the listing at Amazon above in the posts.
Best place I found to install them is inside the boot, back side of the Pollack connector.
unsavory
Active Member
Hi Folks,
I have the curt harness (installed by a shop) and having issues, are these similar to Bill's?
On my summer 2025 trip I noticed that my passenger rear tail light on the truck camper doesn't work when connected to my RR (not sure if when braking, turning, or headlights or running lights switched or status of tail lights on the RR in same test scenarios)
Truck Camper lights do work properly when not plugged in to the tow bar and/or RR (not easy to test, narrow driveway at home, city living)
I think it was working prior when shop installed
I haven't had time to troubleshoot further (need to crawl under RR and carefully compare pics here to what I have)
My electrical setup
1. 2020 Ram 5500 Cab Chassis (7 pin plug in rear receiver area)
2. 7-pin Y splitter
a. One leg goes to the truck camper via 20ft extension (2023 Northern Lite, I disconnected the charge line inside the camper at a breaker since I've drained the chassis batts leaving it connected)
b. Other leg (7 pin female receptacle) serves towed vehicle and mounted on hitch extension (I tow RR or 2 different trailers)
3. Tow Bar Roadmaster Nightwawk
4. Pollack? receptacle installed in RR front area
5. Towed vehicle charging system Blue Ox (takes power from installed in RR battery area)
6. CURT 52103 Custom Towed-Vehicle RV Wiring Harness for Dinghy Towing, Fits Select Ford F-150 with LED Taillights, Black
Also should note
Connection backfeeds (press brakes on RR, lights on TC go on (diode fix, on my list..)
I have the curt harness (installed by a shop) and having issues, are these similar to Bill's?
On my summer 2025 trip I noticed that my passenger rear tail light on the truck camper doesn't work when connected to my RR (not sure if when braking, turning, or headlights or running lights switched or status of tail lights on the RR in same test scenarios)
Truck Camper lights do work properly when not plugged in to the tow bar and/or RR (not easy to test, narrow driveway at home, city living)
I think it was working prior when shop installed
I haven't had time to troubleshoot further (need to crawl under RR and carefully compare pics here to what I have)
My electrical setup
1. 2020 Ram 5500 Cab Chassis (7 pin plug in rear receiver area)
2. 7-pin Y splitter
a. One leg goes to the truck camper via 20ft extension (2023 Northern Lite, I disconnected the charge line inside the camper at a breaker since I've drained the chassis batts leaving it connected)
b. Other leg (7 pin female receptacle) serves towed vehicle and mounted on hitch extension (I tow RR or 2 different trailers)
3. Tow Bar Roadmaster Nightwawk
4. Pollack? receptacle installed in RR front area
5. Towed vehicle charging system Blue Ox (takes power from installed in RR battery area)
6. CURT 52103 Custom Towed-Vehicle RV Wiring Harness for Dinghy Towing, Fits Select Ford F-150 with LED Taillights, Black
Also should note
Connection backfeeds (press brakes on RR, lights on TC go on (diode fix, on my list..)
songkajai
Well-Known Member
HI, No bills killed the sensors and gave dash light warnings when connected.
Odd, but in your case I would install the diodes first.
Once that is done the power going back to the ranger is a one-way street.
It sounds as if the back feed or current issues is playing havoc on your Ram.
First report of any issues like this, but not surprising with everything being electronic now!
This might not be the cause but a good first step to avoid any possibility.
That it seems to be only one light is questionable as well.
If it is a back feed, when you open the door the ranger lights come on for a bit, this is when a back feed could cause the most trouble. Once the lights turn off you really should not have any back feed since the ranger is not powering any lights.
You will see this as even if not plugged into the RAM side and you open the door the nighthawk towbar leds will turn on. With it plugged into the Ram that would be going back to the Ram side as well!
Odd, but in your case I would install the diodes first.
Once that is done the power going back to the ranger is a one-way street.
It sounds as if the back feed or current issues is playing havoc on your Ram.
First report of any issues like this, but not surprising with everything being electronic now!
This might not be the cause but a good first step to avoid any possibility.
That it seems to be only one light is questionable as well.
If it is a back feed, when you open the door the ranger lights come on for a bit, this is when a back feed could cause the most trouble. Once the lights turn off you really should not have any back feed since the ranger is not powering any lights.
You will see this as even if not plugged into the RAM side and you open the door the nighthawk towbar leds will turn on. With it plugged into the Ram that would be going back to the Ram side as well!
RoughRider
Member
on the third order, somehow they sent the wrong one the first two times, everything works as it should
unsavory
Active Member
I think it might be a bad connection somewhere, since we tested everything (except backfeed when pressing brakes on dingy) before I drove off the install lot this summer.
If it was diodes, it would have been present right away, something changed
Its the side/named tail lights on the truck camper itself that dont work on when fully plugged into to RR for flat tow, not the (Ram) Big truck under the truck camper
Currently saddled with other projects, overdue twice a year clean truck check for the Ram diesel, I/M monitors not ready for obd2 tests, trying to get drive cycles to complete, drove a few hun mi, lots of internet research, cleared a dtc errror that may be preventing, need to drive it more
Superhitch/supertruss install big truck are a few
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