Kenworth T680 internal CB speaker stops working

Also, it should be noted that my auto start doesn't work. Despite having my truck in a company shop 4 times and the Kenworth shop once, it still doesn't work for low batteries. It will happily allow my truck to die. Every shop tells me that it was wired incorrectly. Huh.


So what I've been doing is turning off the bunk fan, setting the thermostat to 60 and holding a heating pad against it until it kicks on. Then I turn the front heater to 84. Itll idle for one hour, shut off for around 10-20 minutes, then idle for an hour again.


If I ever decide to go owner-op, I'm getting a truck with an APU. This auto-start crap is for the birds.

 

Glad I came across this post. I have a 2020 t680 and was scratching my head as to why the speaker didn’t work. Thought maybe it was my radio. I’ll grab one of those $20 speakers and test it out.

 

I found out what the problem is. Go into the audio settings of your Qualcomm and set it to use the onboard speaker instead of the external speaker. This is what fixed it for me.

 

Good catch!! The Qualcomm has a tendency to semi-permanently interrupt speakers. It was already set to “onboard” but if the qcomm goes into sleep mode, it’ll send a signal to the speaker that can only be overwritten with a reset of the qcomm. I went to “setting/speakers/apply and hit yes to reboot” and problem solved.

I only mention this because it could possibly reoccur in the future for those who have already switched to onboard as you mentioned.

Thanks driver!!