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Replacing 5-Wire, 4-Way Wishbone Trailer Connector w/4-Wire Connector Causes Lights to Fail  

Question:

I have 5 wires on trailer and goes in on 4 prong.The origanal plug broke.I bought new plug replacment and it has 4 wires,green , yellow,white brown.when i hook both browns together at plug right trailer blinker works left blinker lit bright and barley blinks ?

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Expert Reply:

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 jumper wire between the 2 lights.

What you could do is connect just one of the brown tail light wires, tape up the other, and have a jumper go from one side to the other.

The other thing you can do is use a new 4-Way wishbone wiring harness for the trailer like # A35W42B.

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Michael H

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