Before anyone with a Weight Police fetish reads any further, this is not a RV towing setup - no issues on that front.
Anyway, we have a 2004 Jeep Liberty, for U-Haul towing, with an aftermarket bolt-on hitch and a T-One wiring harness adapter. The wiring harness is exhibiting some off behavior. This is the specific item used for the wiring: adapter. We are experiencing intermittent problems with the left (driver's side) turn lights partially lighting up when the brakes are applied. Again, this is not consistently the case, though - sometimes it happens, sometimes it doesn't. The adapter is grounded to bare metal of the frame. The connectors are tight and locked (little red tabs on the OEM connectors). Everything basically works except for the once-in-awhile half illumination of the left turn signals when the brakes are applied. As you might expect, everything returns to normal if the adapter is taken out of the circuit by disconnecting it and using just the OEM wiring. The occasional nature of this problem really has me scratching my head.
I still sounds like a grounding problem. I'd first add a second ground wire from the frame to the unit.
I had a problem with the dual filament bulb on my toad burning out on the left side with too much regularity. Found that it was a weak ground that looked good and tested good with a meter. Redid the grounding to it and it no longer burns out the bulb. A lack of ground is probably the most frequent electrical problem in autos and rvs.
hershey - albuquerque, nm Someday Finally Got Here
My wife does all the driving - I just get to hold the steering wheel.
Expedition - Suzuki Grand Viagra
My first thought is ground...double check a bare metal connection for the ground.
My second thought is bleed over...some where one of the wires is not completely isolated from another, causing one ciruit to bleed over into another.
I will re-check the ground again. It is definitely a bare metal ground and did ohm out well with my Fluke, but it won't take but a few minutes to run a second ground to the frame. Thanks for the input.
Cybergrunt wrote: I will re-check the ground again. It is definitely a bare metal ground and did ohm out well with my Fluke, but it won't take but a few minutes to run a second ground to the frame. Thanks for the input.
I also think ground...but I had a rarity one time that was similar. Make sure the bulb has not been turned so far that it has gone past the socket cutout notch and is contacting the other point. It can cause exactly what you are saying.....Brian
It looks like the Jeep has separate bulbs for turn signal and stop lights.
In trailer lights, the turn signal and the stop light are the same bulb (or bulb filament in dual filament bulbs).
That adapter combines the turn and stop signals from the Jeep for the trailer bulb.
I suspect that there is an intermittent problem in the adapter that sometimes causes the Jeep turn signal to light - a "feedback" or short from the trailer output back to the Jeep input.
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