why does the truck make a constant tick for a few minutes when turning on/off?

What is your question?

when the key is turned on and off, a tick comes from the area under the dash on the passenger side. it lasts for about 2 minutes and then shuts off. it also ticks whenever you turn the a/c or heat on for the same amount of time. it does not affect the drive of the truck but is annoying and embarrassing.