Awesome advice! Will update with results!! TY!!

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Elaine and Bill Stevenson
Former HiLo-Classic 310S
2011 Toyota Sequoia

I did the above but still have no lights. Fortunately we have brakes! I still can not understand why these work and the lights do not

I accessed HTF from the campground on my phone. I am now home looking over a few older posts with the same problem on the computer, so much easier...

This was only our second trip out this year…we have always used the contact spray, but never the dielectric grease...hoping to get this fixed quickly to enjoy some fall camping!

Thanks again!

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Elaine and Bill Stevenson
Former HiLo-Classic 310S
2011 Toyota Sequoia

I wonder if they share a common ground that is faulty? IF you could attach a jumper wire to a known good ground, probably on the tow vehicle, then probe with a voltmeter at the positive wires at the lights with the voltmeter negative probe on the jumper wire. If you get voltage, it's a faulty ground.

AND, the fuse in your TV may look OK, but try replacing it with a known good one. (Or check it with an ohmmeter.)

- Jack

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Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger, Equal-i-zer WDH, Progressive Dynamics Converter, Fan-Tastic Fan, LiFePO4 battery 12V DC Electrical System
2014 F150 Platinum 4x4 3.5L EcoBoost SCrew

Go to the terminal strip in the battery compartment and check for clean and tight connections where the pigtail to the TV are connected. Next, plug the pigtail into the TV and turn on the lights and check to see if there is power to the individual connections by using a test light or ohmmeter. As said above, check grounding.

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My Great Wife Joyce
2018 Jayco Jay Flight 21QB
Formerly owned 1705T and 2310H
2012 F150 4X4 SuperCrew EcoBoost w/Leer Cap
Reese WD Strait-Line Hitch
Amateur Radio K3EXU

Duh! Wish I'd thought of that. My poor old brain cells seem to be less and less lively. Great post, Rich.

- Jack

Another check for ground is to connect a temporary jumper cable from a grounded metal surface on the TV to the ground stud on the trailer. Plug the trailer to the TV and see if that solves the problem. If it's not the ground wires, start working this methodically.

First, check the socket in the tow vehicle. Use a voltmeter and check every contact with the lights, brake lights, turn signals, etc, on and off. Alternatively you can use a trailer socket checker, but that doesn't give you the flexibility of a voltmeter. If everything is OK, check the trailer plug.

Make a set of jumper cables that you can connect to the trailer battery, or a spare battery. Connect the negative to the ground terminal in the plug. One by one connect the positive to each of the other terminals. Remove some of the rear bulbs and check for voltage with your voltmeter. Also, check the bulbs to make sure they are OK. If things check OK, you may have worn or corroded contacts in the trailer plug or socket. This is resulting in lack of contact when connected. If no good, trace the trailer plug wires to see if they terminate at a terminal block.

At the terminal block, use your test setup to apply power to each terminal. If the lights work, the problem is the trailer plug and/or cable. Replace them and make sure you wire them to the terminal block correctly.

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Raul

2408T
2010 Nissan Frontier, 4x4, Crew Cab

Thanks everyone - we will certainly try these recommendations. We hope to get this issue solved quickly~On another note, I called today to inquire about winter storage We put her away the last weekend in October before the snow flies here in Ohio!

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Elaine and Bill Stevenson
Former HiLo-Classic 310S
2011 Toyota Sequoia