I have only one high beam. My Mack dealer told me it was very strange to have a light problem and no check light. Both low beams work fine and no other light problems anywhere. The dealer told me if I unplug it and try to test anything that I might get the check light and the plug might not work at all to check with a test light. I'm not sure where to begin checking.
My second issue is my radio shuts off after one hour, I have to turn it on every time I start the truck, and if I forget to turn off the radio when I turn off the truck it stays on. I've read that it can stay on with the key off and the shutdown timer is a safety feature so it seems like it's not getting power from the ignition. Is there a fuse that sends separate power from the ignition to the radio?
Thanks for taking the time to read.
