Help with trailer lights

[BruceP]

Brake lights work. Blinkers work. No amber running lights or tail lights. Plug looks fine. No pinches or broken wires. I cleaned trailer ball and inside of hitch. Checked the fuse box. All are good. Any ideas or help would be appreciated

[11pounder]

Often the sidemarkers are grounded to the trailer through the pop rivets that hold the lights to the trailer, my Ranger trailer is this way. I drilled out the old rivets and cleaned the inside of the hole and they have worked about 6 or 7 years now. Pop the lense out and check the rivets for corrosion. Oh and check the ground on the tow vehicle and trailer.

[bpicinc]

Often the sidemarkers are grounded to the trailer through the pop rivets that hold the lights to the trailer, my Ranger trailer is this way. I drilled out the old rivets and cleaned the inside of the hole and they have worked about 6 or 7 years now. Pop the lense out and check the rivets for corrosion. Oh and check the ground on the tow vehicle and trailer.

This!

[mactlman]

have a good test light really easy to figure out with one

[billnorman1]

Normally the trailer frame provides the ground for all the lights and the back-up solenoid, so if any of these work it is not the ground. The running lights run off the bRown wire. They also have their own fuse in the tow vehicle.

[BruceP]

Found the problem. No power to trailer harness plug in. All fuses good. So, appointment next week at dealership. Thanks to all who offered advice.

[mikeky]

Sometimes fuses can look good but be blown. If you didn't already, check them with a meter if you have one,or just replace. Might save a trip to dealer.

[Coho975]

Often the sidemarkers are grounded to the trailer through the pop rivets that hold the lights to the trailer, my Ranger trailer is this way. I drilled out the old rivets and cleaned the inside of the hole and they have worked about 6 or 7 years now. Pop the lense out and check the rivets for corrosion. Oh and check the ground on the tow vehicle and trailer.

This^^ and they usually use those S****y squeeze type splices that inevitably fail.

[swamprat]

If it's a Ford pick up, running lites have their own fuse, Seperate from brake and blinkers.

[krindgen]

This^^ and they usually use those S****y squeeze type splices that inevitably fail.

MarineMaster trailers have a similar issue. The grounds are installed AFTER the Gatorhyde. So the ground works fine until corrosion disrupts the ground path through the threads of the fasteners.

[Hchamberlin1]

If it's a Ford pick up, running lites have their own fuse, Seperate from brake and blinkers.

2nd this, really sounds like a fuse