Marker Lights Dimming

Long story short I swapped all of my lights over to amber/purple Trux LED lights. Well I’ll randomly have a light either completely go out, or dim. Right now one of my lights dimmed out on me, I swapped the whole light out, made sure it was wired exactly the same, and the same issues occurs which is the running light remains dim.

What would cause this? The remaining 4 cab roof lights are on full power. Recently had to replace the low voltage disconnect module on the truck which is a 2023 KW W900L.

 

I messed around with the plug itself and couldn’t get it to get back to being fully lit. It being a 2023, do you think it’s likely a connection issue with the plugs or possibly a ground wire gone back behind the panels in the cab?

 

I put a brand new one on, same result.

 

I’ll have to get a voltmeter. I slightly crimped the ground and powered female ends as the plugs were a tad bit loose, that didn’t do anything. I checked the ground wire that was connected at the back of the housing that *looked* good and clean. I’ll randomly hit a bump on the road and it’ll power up for a seconds and then go back to dim. Thinking once I clear the voltmeter aspect, I’ll have to put the housing and chase the wires.