How Does the Optronics 3-Function Tail Light Provide 3 Functions if There are Only 2 Wires

Updated 09/26/2012 | Published 09/25/2012

Question:

how does it work all functions with only 2 wires? also i have this trailer do i need more lights?

asked by: Steve

Expert Reply:

The Round Trailer Tail Light # ST24RB grounds through the mounting studs so the two wires are all that is necessary for activating the stop/tail/turn signals of the light. The bulbs are dual intensity so each wire will control a different intensity of the bulb and then ground through the mounting studs. The stop/turn will be on one wire and the tail light will be on another.

To determine if you need more lights at the rear of your vehicle you will need to consult your local laws and regulations. Typically there are different light requirements for trailers that are less than 80 inches in width versus trailers that are wider than 80 inches.

expert reply by: Jameson C