kenworth 2007 gauges and dash light problems

I been thinking the sane but haven’t had a chance to look for it and was just curious to see someone else’s thought.

 

Add me to the list of suddenly non-functional gauges and back lighting!! in my case, when I turn key 1. no gauge check, 2. no movement from any gauge. 3. only back light functioning is spedo/ rpm (does not display eng. Hrs. )
fuses are good, relay good (radio playing)

 

Did you figure out the problem?

 

I have a 07 t600 and it had 2 relays that control power into the cab. One gets power to windows radio ac etc but the other one is for the dashboard and ignition switch to computer... and it has a ign switch relay besides these two relays im talking about
Because mine went bad and all the lights on dashboard and gauges had no power exept the cluster for speedometer and tachometer
I thought it was the computer that had burned or something because it did the samething when i had to replaced it like couple months before this happened but i was wrong. I bealive is label Acc not sure. But i swap relays and found that was the problem. You should try replacing the relays you never know..good luck

 

Sory for the delay as more and unrelated problems came up that I had to deal with.

Gauges,
I couldn't figure it out, so I conceeded to take it to Jubitz repair..
They found a burnt fuze and a shorted out "circuit"

This fixed it for a couple weeks, and now all the lights on the dump body and dash lights go out just driving down the road, replaced the same 30A fuse 2 times to get me home at night. Tried a 40a fuze still blew out within 30 seconds of turning on the lights switches.

Other problems I have had to deal with in the last few weeks
new drop axle wheel bearings (x4)
now chasing a heavy cold water coolant leak (1-2 gals a day)
truck going in AGAIN for the electrical this weekend ($140 hr.)

 

Did you find a solution? I'm having the same problem

 

the dash lights, at least in-part, were controlled by the fuse that blew.. they DO come on when the ignition is turned on and when the fuse is not blown during the gauge sweep..

will hopefully find out after the check this weekend and $$$

 

Did you find out the problem? I have no light in dash and gauges dont work

 

I unplugged ecm. Cleaned plugs put back in and it worked.

 

IT WAS A BLOWN FUSE IN COMBINATION WITH A MYstery short somewhere after spending $$$ in diagnosis charges i gave up and just sold the truck. we never found the short that kept blowing the 20A fuse every few seconds.