When you say it is dinging, do you mean the chime to tell you the lights are still on when you remove the key is going off? Is the chime going all the time or only when the truck is off?
Can you get a video of what this is doing?
Basically, if the lights are remaining on and the chime is going on then that means the control module is seeing the light still on so the likely cause would be a switch issue.
https://www.2carpros.com/articles/how-to-check-wiring
We should check the voltage at the lights and then track it backwards through the system to find where we have the voltage. Basically, if the switch has power coming out of it, then the switch is shorted.
I attached the wiring diagrams below.
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Thursday, January 20th, 2022 AT 2:04 PM