T660 turn signal/flasher problem

I agree with that. Did it plenty of times myself.

Usually when you connect to a trailer, you want a tight fit. If you can move it around to the point when it starts affecting the lights, it's time to get a new pigtail.

 

This went from tractor flashers to how to fix a loosen pig tale with a screwdriver.

How long have they not worked for? Could be as simple as the bulb being in the wrong way or relay to power supply. Let us know.

 

Were you connected to the trailer at the time the tractor hazards stop working? I was assuming that you were.

 

We rarely see these go bad, I think I've only seen one go bad once since I've worked for my KW dealer. On our side, having a chassis node and computer-controlled everything is awesome. But for drivers that don't have the software to work on them it's a pain in the ###.

 

Peterbilt/KW is still Paccar, to cut down on costs and R&D, I'm sure they share alot of the same Electronic and electrical parts.

Anything made in these modern times are pure junk, they only make it to last a certain lifespan, and when it starts falling apart you throw it away so they can sell you another one.

That's how Companies stay in business.

 

NGP Peterbilts and KW's (T680, T880, 579, and 567) are electrically all the same. Some of the harnesses even use the same part numbers, but all of the harnesses use the same connectors, wiring, and pin locations. Before there were two different engineering teams working on each brand and they rarely collaborated. That means if you compare a 389 to a W900, they'll be very different.