How to Wire Black and White Wires on Side Markers Using Wishbone Harness A35W42B
Updated 09/17/2019 | Published 09/15/2019
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Question:
My markers have red and black wires. The main tail light wires are green/ brown and yellow/ brown. Where do the red and black wires go?
asked by: Thomas A
Expert Reply:
To wire a side marker or clearance light that has a two wire design like # MCL31AB, the white wire needs to be grounded to your trailer frame while the black wire which is for power needs to be connected to your running light circuit.
On a wishbone style trailer harness like # A35W42B the running light circuit is split into two which is why you see the green/brown on one side and yellow/brown wire on the other side of the trailer. You can simply connect the black wire coming from the side marker to the brown wire on either side using a butt connector like # DW05744-5.
Product Page this Question was Asked From
35 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 42" Ground
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 4 Flat
- Plug and Lead
- Optronics
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