Mirror lights on 389

I have a 2013 peterbilt 386 and found the blinker/marker light wires under the dash
1st location pull the glove box out and look for the mirror heat and the others will be with it has rubber ends on them...
2nd Driver side I pulled the tachometer cluster out and its the same thing as passenger side. But right behind the AC vent in a cluster of wires I had found it..

Problem im having is I can get the marker lights to work but the blinkers I cannot get them to work... I dont know if I had blown a fuse and even if I did I cannot find a mirror blinker fuse hmmmmm dont know how to get these blinkers to work

 

Hey

 

Thats the problem I'm having I got the marker lights to work but the blinker lights I cannot get them to work.

I dont know if I blew a fuse or not but if I did I dont know which one it would be anyway.
All the blinkers work on the truck and trailer so not sure if there is a separate fuse for mirror blinker fuse

 

Side turn signals need to get enabled in the CECU. Dealer or someone with ESA can enable it.

 

Have been to the dealership and they couldn't get them to work they turned the side turns on and did update on the esa still nothing. Had three tech at one time after hour and half they gave up. Guess going to hard wire to trailer plug.

 

I know this is old thread BUT. I recently had dealer add blinkers to my 2018 389, there LED, they blink fine for about 5 times then the indicator on dash starts blinking fast as if I have a bulb out, but they all actually blink normal speed. dealer won't call back. I have the most incompetent pete dealer near me. any suggestions??

 

Replace the “blinker” unit for one that can be used with an led. Once the led is added, it changes the resistance of the circuit and the unit thinks there is a burned out light.

 

I'll give that a try. you would think a peterbilt dealer would know that. I gotta find a new shop to bring my truck to. they literally mess up everything. thanks for the help.

 

There is not a flasher for the signals on that truck. It is all done inside the CECU/chassis node.
Dealer needs to program turns signals to led