Thanks: 
HaHa: 
Reply With QuoteTake a test light and connect clip to 'hot side'. Then take probe end and find a good ground. On battery it would be hooking to + side and probe end on - side. <*)}}}><
Slabmaster
Trailer lighting issue
OK....Here is my story, and I appreciate any advice in advance.
The left side of my trailer lights were not working. (1) I checked the ground on the light, scuffed up the connection, and did the same with the ground at the ball. Nothing. (2) I took a volt meter to the plugin the goes directly to my light. I got a reading of about 10.5 or so. (3) I took the light and switched it over to the right side, where everything is working fine, and the light worked. Everything I read said 99% of trailer issues is a bad ground. The only grounds there are, are the grounds at the lights and at the ball correct? I have been so stumped that I (4) ran a whole new trailer wiring kit, and the ground at the ball used to be wedged between an old rusty bolt, so I inserted a self tapping screw right into the trailer this time. After the whole new trailer wiring, I put the keys in the car, and BAM, the same exact result. I am completely stumped.
Moderator Kansas Forum
Take a test light and connect clip to 'hot side'. Then take probe end and find a good ground. On battery it would be hooking to + side and probe end on - side. <*)}}}><
You'll see the difference,,,on the end of your line! PROUD MEMBER OF TEAM GEEZER
Slabmaster
Crappie.com 2K Star General
There should be a white wire in the group, that is the ground. Most likely it's grounded to a screw or bolt near the front where the wires come out of the tongue.
Moderator Kansas Forum
On boat trailer at light. <*)}}}><Originally Posted by Coy
You'll see the difference,,,on the end of your line! PROUD MEMBER OF TEAM GEEZER
Crappie.com 2019 Man of Year, Supermod & Moderator of the Mechanics Forum
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If it's a late model truck, find the fuses for the trailer lights. Should have a separate fuse for each side. Get your book or google your truck. Some of them are pretty hidden and may not be in your regular fuse panel.
Moderator Kansas Forum
Since you have power and ground on right side,, I feel you are still looking at a bad ground at left light. They share same power, brown wire. <*)}}}><
You'll see the difference,,,on the end of your line! PROUD MEMBER OF TEAM GEEZER
Crappie.com 1K Star General
Don't depend on the ball for ground. Make sure white wire is grounded on the truck as well.
Hanr3 LIKED above post
Slabmaster
All grounds havr been checked and re-checked. Agree some reading last night, I think Cray is on to something. Going to check fuse tonight. Thanks
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Is it the running lights/tail lights that aren't working or the brake/turn?
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