Find the ground wire where it comes from the trailer wiring plug, connect it to the chassis of the trailer by drilling a suitably sized hole and then secure it using a nut and bolt or self tapping screw (suggest that you find aluminium nut & bolt/screw to prevent corrosion problems between steel and aluminium, alsoClick to see full answer. In this manner, how do you ground a trailer light?Helpful Expert Reply: Each lamp needs to be grounded either through its mounting studs being in direct contact with the trailer frame or by having a jumper wire ran from the lamp to the trailer frame. Ground the trailer connector at the front of the trailer, which will use the trailer frame as a ground wire.Subsequently, question is, can you ground to aluminum? Aluminum is a great conductor, and is still used on most high dollar switch gear. And it is used in conjunction with copper all the time. In short, Yes, your manifold will work OK as a ground. Considering this, will trailer lights work without ground? In some cases trailer lighting will ground through the hitch ball but that’s typically only if the actual ground circuit is insufficient. It needs to ground through the wiring of the trailer harness.How do you test a ground wire on a trailer?Check out the white wire on the trailer to see if it’s actually used as a ground (which it should be). Those 4 wires should be green, yellow,brown and white. Check out the white wire on the trailer to see if it’s actually used as a ground (which it should be).
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