My Volvo is telling me that the trailer marker light circuit is open...

You couldnt find the garage area Mikee???

http://www.thetruckersreport.com/truckingindustryforum/trucks-eighteen-wheelers/

 

[h=2]My Volvo is telling me that the trailer marker light circuit is open...[/h]
...so close it?
Is your truck trying to nicely tell you your fly is down? I dunno....

 

Mine did that. Turns out one of my blinker lights wasn't working. Don't know if that's your issue or not.

 

LED lamps?

 

The Volvo I run would show me that my running lights on the truck had an issue when I first turned the lights on and than the message would go away. It took me a couple of days to catch it and it was the license plate lamp that caused it due to corrosion.

 

check light cord plugs for corrosion ?? unplug from tractor and see if code goes away .my shaker had corrosion on backside and caused similar codes

 

had the the same thing but with a trailer.. it was a fuse,, its labeled on your fuse panel.. theres a few, 20 amp i beleive.. it's might worth a try

the plug in for the tractor tail lights is another place to look un plug it clean if needed plug back in, had some bad wiring there.. easy fix

 

The fuse replaced on the dash on mine was cased in metal.. can't see inside if its bad, it's the same as the plastic, where you can see if it's burnt, what can cause it is a surge when hooking up pigtail from tractor to trailer with flashers and lights on, good luck!