4-Pole Trailer Wiring Functions & Wiring Installation for Optronics Oval LED Trailer Light STL78RB
Question:
STL78RB I was going to purchase two of these for a coleman camper. I have a 2017 Tacoma with tow package. I have the 7 pin and 4 pin options. Could i just use a 4 pin for this application when hooking to tacoma just not using the 4th pin for marker lights?? Didnt know if i need the 3 pin adaptor. Thank You very much !!!!
asked by: Bill B
Expert Reply:
In standard 4-pole trailer wiring there are actually three active lighting circuits plus a ground. The tail light (or running light) function is carried on the (usually brown) wire that is next to the ground pin. Please refer to the linked photo of a trailer-side 4-pole connector that shows these circuit/function assignments.
The next pin over, the one for the yellow wire, typically carries the LEFT stop and turn light functions which are combined onto this one wire; and the RIGHT stop and turn light functions are on the green wire. You need all three of these lighting functions active for towing your Coleman camper trailer. If the trailer has electric brakes then you need an additional circuit for that trailer brake function to work, either a 5-pole, 6-way or your factory-installed 7-way wiring setup. You can also refer to the linked article on trailer wiring for more information.
The Optronics Oval LED Trailer Light # STL78RB uses a 3-wire hook-up. The white wire is ground, the red wire handles the stop and turn functions and the black wire handles the running light circuit.
Product Page this Question was Asked From
Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens
- Trailer Lights
- Tail Lights
- Stop/Turn/Tail
- Oval
- Surface Mount
- Submersible Lights
- LED Light
- 6-1/2L x 2W Inch
- Red
- Optronics
more information >
Continue Researching
- Article: Most Popular Wheel Bearings
- Video: Optronics Trailer Lights - Clearance Lights - MC32AB Review
- Video: Optronics Trailer Light Installation
- Shop: Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens
- Search Results: trailer lights
- Search Results: rv drinking water hoses
- Shop: Optronics LED Mini Clearance or Side Marker Trailer Light - Submersible - 2 Diodes - Amber Lens
- Shop: Hub Bearing Kit for Lippert, Dexter, and AL-KO Axles - 3,500 lb with #84 Spindle
- Shop: Grease Seal - Double Lip - Inner Diameter 1.68" - Outer Diameter: 2.33" - Qty 1
- Q&A: Recommended 4 inch by 2 inch Clearance Light for Trailer
- Shop: Thinline LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 15 Diodes - Red Lens
- Video: Hollywood Racks LED Light Bar Review
- Q&A: Why is There Two Holes on One Side of Saris Aluminum Hitch Adapter Sleeve and One on Other Side
- Q&A: Size of Bolt in Saris Replacement Aluminum Hitch Adapter Sleeve # SA3032
- Q&A: Is Saris SA3032 1-1/4 to 2 inch Hitch Adapter Threaded for Hitch Pin
- Q&A: Length and Hole Size/Spacing for Replacement Aluminum Adapter Sleeve for Saris Bike Racks SA3032
- Shop: Easy Grease Trailer Idler Hub Assembly for 3.5K Axles - 5 on 4-1/2 - Galvanized
- Shop: Bearing Kit, L44649 Inner/Outer Bearings, 10-9 Seal
- Video: etrailer Trailer Hubs and Drums - Hub - AKIHUB-545-35-G-EZ-K Review
- Q&A: How to Determine Weight Capacity of Trailer Axle
- Q&A: Is There A Bearing Kit for L68149 Inner Bearing, L44649 Outer Bearing, and 168233 Seal
- Video: Review of etrailer 2" To 1-1/4" Receiver Adapter With 4" Extension - e58YR
- Video: etrailer Trailer Hitch Receiver Adapter Review
- Video: Review of etrailer No Extension Receiver Adapter 2" To 1-1/4" - e63YR
- Search Results: tail light mount
- Search Results: trailer wiring
- Search Results: tape
- Search Results: butyl tape
- Search Results: dw05714
- Shop: Trailer Hitch