my "new" t/c hauler project "Revisited"

Specularius wrote:
The easiest way to get amber turn signals on the back is to tie into the front turn signals and run the wire to the back of the truck. I did this to my dually to make the fender lights flash when turning.

on a f250/350 non chassis cab truck i would agree, but as you seem to work with some chassis cab {upfitter} trucks you probaly know this already but i will put it out anyways so everyone knows what i am working with for wiring.. the harness to the rear contains 11 wires two sets of regular s/t wires, running light wire, third brake light wire, trailer brake wire, common ground, fused and relayed trailer running lights wire, truck reverse wire, fused and relayed trailer reverse lights, fused and relayed trailer charge wire so the wires are already there to do it...i had thought of doing something similiar to your company trucks using three red lights and use the trailer running light circuit for the outside light and have the s/t/p in the middle and the third brake light circuit for the inside one..i like your idea of making the bed marker lights blink..due to the length of the truck i have i want to put turn signals on the sides near the middle for the safety of it..

oops forgot to count in the sending unit for tank and fuel pump wires