JL Tow Bar Wiring Fault

Not again

New Member
Joined
Aug 7, 2020
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Location
New south Wale Australia
Vehicle(s)
2019 JL wrangler Sport
Hello All
As a Newby to this site I have a question / problem I need help with.
I have a 2019 Jl wrangler sport (in Australia) that I have recently fitted a Hayman Reese towbar and wiring loom too.
At the trailer plug the lights all work correctly when ignition is off or on accessories or start position, When the engine is started and running they work either intermittently or not at all. The Hayman Reese module has been replaced to see if faulty and it was not (according to Hayman Reese). The signal wires coming from the car to the module drops to 11.1 volts when the engine is running, Hayman Reese say this is the problem and is a Jeep fault not there wiring. Can Anyone please tell me if this is normal or if there is a fix ???.
 
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