No trailer lights

[Jsusluvsyou]

I have a a122BH 2014, one year warranty almost up. I tow with wife's van but
Had a hitch put on my Toyota Tacoma truck, ... I had lights on the way back to uhaul. I had receiver put on but took my a frame back to have them check the right hitch heights. Lights worked on the way there but ready to leave no lights. We checked fuses, hooked the trailer up to one of their trucks, lights worked. But did not work on my truck. On the way home the lights came on. Couple of questions ...
1. Will lights work with battery disconnected?
2. If something left on (dometic fan) will that drain and make lights not work?
3. Will a dead battery cause the trailer running lights not work?
Have an appointment to take everything back to check it at uhaul but not sure if I need to go back as the lights are working now. We have had the trailer for a year and no problems with lights,or hitch installed from Lazy days dealer.

[rockfordroo]

Trailer running/stop/turn signal lights are completely separate from trailer battery and it's circuits. I think you have a problem with your trucks wiring or with the connector between truck and trailer. If none of the lights are working, it could be you don't have a good ground.

[Jsusluvsyou]

Thanks, that must be it so guess I need to keep my uhaul appt and tow the a frame so they can check it.

[D-mo]

Both the Frontier and Tacoma have dedicated lines for towing lights. This requires the use of an wiring harness specifically made by the manufacturer for 7 pin applications. The aftermarket light tie in harness is fine for a 4 pin .... but if you are using all the lights on the trailer ... i think there are 12, use the OEM.

d-mo

[rawlus]

a trailer plug checker is a fairly inexpensive item and will tell you if there's a wiring problem in the tow vehicle's wiring.
Amazon.com: Curt Manufacturing 58270 12V 7-Way Rv Round Circuit Tester: Automotive

[daveinpickerington]

Originally Posted by rawlus

a trailer plug checker is a fairly inexpensive item and will tell you if there's a wiring problem in the tow vehicle's wiring.
Amazon.com: Curt Manufacturing 58270 12V 7-Way Rv Round Circuit Tester: Automotive

+1

I have this exact item. It works great and can be shared with fellow rvers.

Dave

[drc343]

Sounds like a bad ground.

[force]

Originally Posted by drc343

Sounds like a bad ground.

Same here. In my experience, 9 out of 10x any (or all) lights are out, it's because of a bad ground.

The other time I think I forgot to plug the connector in

[Jsusluvsyou]

Took it in yesterday redirected the ground still flickering wire. Was the older wire harness( loose wire) secured and will watch it for now. If it still happens will replace wiring harness.