Posted 11/25/2012 14:48 (#2716172 - in reply to #2715798) Subject: Re: Does my trailer need LED lights?
NW Ohio,near Findlay
Some of the older R model Macks that has two 12Volt batteries, 24 Volt Start, the trailer lights are on a positive ground. Friend bought a newer trailer with LED lights, and found out they will not work. Had to change them to standard light to work with the truck wiring. Truck was not worth changing system , starter and all to 12 Volt negative ground.