kenworth 2007 gauges and dash light problems

I have seen issues like this before where it was the icu/cecu that had failed. it is located behind the center cup holder. you can test one of the plugs for power and ground (the one on the end, 9 pin I think) if when you pull the fuses to do a reset and nothing happens, it sounds like the cecu failed. have replaced these just for no dash light issue before. they are pricey, around $1200 here.

 

Check all your grounds first start at the batteries to frame, frame to cab, cab to dash. the '07's are mostly fiberglass/plastic, on my '05 T-600 the only thing my electronic gauges and dash lights have in common is the ground.

 

Had same issue ended up having the EMC crap out 1 month later at a stoplight.

 

Did you ever figure out what the problem was? I'm having the same problem!

 

You can check the relay located on fuse panel
Dont know the label. It has something to do with the ign
mine went bad on me and it had same symptoms as yours

 

Did you ever figure out what it was. Im having same issue. Motor starts and just idles. No dash lights and none of guages work. Replaced ECM and same thing. Cant figure it out. Anybody. Anything that can help me out.

 

kenworth 2007 t600 cab lights wont stay on when i shut off my truck.i have check all the relays and fuse. but i found no power in cab interior marker lights fuse under the fuse box.i need a suggestion should i run another wire frm spare fuse to tht fuse. plz give me suggestion abt it

 

I have a 2000 t600 and every now and then my interior cab lights are dull and when I use 2 way radio it won’t work like it’s lacking power. If I turn ac, radio and any other accessories of it works fine. Could any one help me with what the problem could be please

 

2000 would be pre-electronic dash so I'm guessing you've probably got a cab ground issue. There's probably a ground strap or ground cable between the cab and frame that is loose or corroded up. No idea where it would be located though.