Converter Recommendation to Install Combined Taillights on a Flatbed Truck that had Separate Bulbs

Updated 12/10/2013 | Published 12/08/2013

Products Featured in This Question

Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diodes - Round - Red Lens

(2079)

$18.57

3-Wire Pigtail for Optronics Trailer Lights - 3-Prong PL-3 Plug - 10" Lead

(381)

$4.69

Roadmaster Brite-Lite 3-to-2 Tail Light Converter for Towed Vehicles

(122)

$57.48

Question:

I purchased these lights to install on a flatbed I built on my 1991 Nissan 4x4 pickup. My stock lights had 2 bulbs to handle the stop, tail, and turn functions. The turn signal bulb had a single filament and two wires leading to it, a power and a ground. The 2nd bulb had two filaments and three wires, one for the tail light, one for the brake, and a ground. I connected the tail light wire to the black wire on the led pigtail and the brake and turn signal wire to the red wire on the led pigtail. i connected both of the ground wires to the white wire on the led pigtail. The tail lights and the brake lights both work, but when I turn on the turn signal in either left or right all four turn signal lights blink, front and back. And when I step on the brake all the turn signals stop. hen I let off the brake all four turn signals blink. I tried disconnecting the ground wires from the white led wires and wiring the white wire directly to ground on the frame with the exact same results. I then connected the ground wires to the white led wire which was still connected to the frame ground-same results, all four turn signals blink and stop when the brake is applied. Any ideas?

asked by: Brian R

Helpful Expert Reply:

It sounds like you need to convert the separate wiring of your 1991 Nissan truck to a combined setup to work with the Round LED Taillight # STL42RB. For this you will need to get a Roadmaster Brite-Lite Wiring Converter # RM-732.

You will run the wires from your vehicle to the right side of the # RM-732 by function, and then from the left side of the box you will run the corresponding left or right turn signal wire to the red wire of the # STL42RB. The tail light circuit will bypass this unit and go straight to the taillight circuit (black wire) of the pigtail for the # STL42RB.

expert reply by: Jameson C