Question about Mopar flat tow wire harness operation.

kosinar

Well-Known Member
First Name
Joe
Joined
Apr 3, 2018
Messages
169
Reaction score
134
Location
South Carolina
Vehicle(s)
2020 Black JLUR 3.0 EcoDiesel received 3/6/20
I have Mopar flat towing wire harness installed in my 2020 JLUR diesel and towing it with the RV. I am using ready brute tow bar that is actuating breaks in jeep by pulling jeep break pedal with a cable. I just completed my towing setup and did few towing test drives. I had my wife following me behind and recording video of break lights and behavior of the jeep. I have noticed that depending on how hard I apply breaks on my RV my jeep third break light will or will not come on. Light application of the breaks will turn only left and right break light but third light will not come on. Only heavier break application will turn all 3 break lights on. Not sure if i can assume that left and right break light will come when RV break signal is send to jeep by Mopar wire harness and third break light is turned on by jeep break pedal being pulled and actuating jeep break light circuit. I would appreciate input from someone familiar with the subject.

Towing.jpg





Advertisement

 

9mmkungfu

Well-Known Member
Joined
Oct 20, 2019
Messages
174
Reaction score
80
Location
United States
Vehicle(s)
2020 JLURD
Can you tell me what the part number is for your harness? Wondering if it's diesel-specific.
 

MoJoe

Active Member
First Name
Joe
Joined
Dec 31, 2018
Messages
27
Reaction score
37
Location
Jacksonville Beach, Florida
Vehicle(s)
2021 Jeep JLURD EcoDiesel, 1985 Jeep CJ 7, 2018 Dynamax Dynaquest XL
Occupation
Consultant- motorcycle and automotive
I have the Mopar harness in my JLUR Diesel. It is not a diesel specific part number. My lights work fine but I am using a Demco Air Force One air brake system.
 

9mmkungfu

Well-Known Member
Joined
Oct 20, 2019
Messages
174
Reaction score
80
Location
United States
Vehicle(s)
2020 JLURD
I should have posted an update - I did figure that out. My problem with the harness was related to the Mopar instructions being wrong. Someone pointed it out in another thread and once the wires were swapped, all was well again.
 

Kraxler

New Member
Joined
Jun 8, 2021
Messages
2
Reaction score
0
Location
Rio Rancho, NM
Vehicle(s)
JLUR Diesel 2021
How did you swap the pins? Getting the pins out and the connector open? I can’t get it open . Thanks.
 

cinap

Member
Joined
Apr 5, 2019
Messages
13
Reaction score
6
Location
Wisconsin, USA
Vehicle(s)
2019 Wrangler JLUR
I should have posted an update - I did figure that out. My problem with the harness was related to the Mopar instructions being wrong. Someone pointed it out in another thread and once the wires were swapped, all was well again.
@9mmkungfu Can you share some more details on this and/or link me to that thread? I have the same harness on mine and none of the lights are working. It was installed by the dealer when I ordered it.
 

9mmkungfu

Well-Known Member
Joined
Oct 20, 2019
Messages
174
Reaction score
80
Location
United States
Vehicle(s)
2020 JLURD

Advertisement




Allmoparparts.com
 



Advertisement
Top