Medium and Heavy Trucks
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Hi my name is***** will be glad to help. Check the wiring harness to the cluster and do a wiggle test on it to check for any loose connections or damage that might cause a loss of power and grounds to the cluster. Test with a volt meter for voltage and ground to the cluster.
I see you have confirmed the power and ground and have tried another cluster. Check for a low voltage disconnect that could have tripped disabling the accessories in the cab. Is it only the dash that is out?
I have some diagrams I can help with once there are two responses from you on this thread. Let me know
Also click below
Very similar... It's the same class truck as 379 as far as the electrical, etc
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