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Your 4-pin/5-wire wiring harness is what is called a "wishbone" type which simply means that there are two separate running light wires, one brown and one pink. This allows a separate running light wire for each side of the trailer…

On your trailer you originally had what is called a wishbone harness. This type of harness has the running light circuit split at the connector so one wire will run to the left side, the other to the right side. This is so you do not have to have a…

The standard 4 Flat will have the White (ground), Brown (running lights), Yellow (left turn and brake), and Green (right turn and brake). Black will typically be used for 12 volt power, but can also be any number of things. The only way to know for…

I went out to the warehouse and pulled a 35 ft. Wishbone 4-Way Trailer Wiring Harness, #A35W42B, and used a wire gauge tool to measure the wires. The copper wire itself is 20 gauge. If you measure the wire with the insulation on it then it is thicker…

From the image you attached, I think what you have is each of the taillight circuits on your 4-way have two wires ran to them for each side of the trailers wiring. You can wire the two wires of each pin to the single wires of a new 4-way allowing the…

I recommend moving away from the Adapter 4-Pole to 5-Pole Trailer Wiring Adapter #47515 and going with a Buyers Products Trailer Connector Adapter #337TC1474P. The wiring and connectors used on the 4-way harness are not designed to be used with the…

If you don't have brake or turn signals on the right side of your trailers then the most likely cause of this issue is just a blown fuse, F81 in the engine bay fuse box which is a yellow 20 amp. If the fuse is good then check the wiring behind…

Connecting the brown running light wire in standard 4-pole wiring to both tail lights will require a jumper wire from one side of the trailer to the other, or you can install what's called a wishbone harness that has dual brown running light…

Did you have a 4-pin connector that had 5 wires or was it a 5-pin connector? There is a big difference since you normally see a 5-pin connector on a boat trailer with the 5th pin used for an electric reverse lockout solenoid on a brake actuating…

What you have is a 4-way wishbone harness like part #A35W42B. It's a 4-way with two brown wires so you can run a running light circuit down each side of the trailer and not have to use a jumper wire to go from one side to the other. It makes…

See the picture to the right for a wiring diagram of seven-way vehicle end trailer connector. If you click on it you can enlarge it. I have also included a trailer wiring FAQ page for you to check out.

The Equal-i-zer Shank part #EQ90-02-4900 would be your best option to give you the amount of drop you need to tow your trailer level. The Curt shank you have now part #C17131 can do up to 2 inches of drop but the Equal-i-zer can do up to 6 inches so…