So I went out today, came home and parked the truck as normally do. Only to look out the window to see what I thought were my flashers on. I went out to turn them off, but that isn’t what it is at all. The dash, head, and tail lights are flashing. I turned the flashers on and turned them back off and a second later everything starts flashing again. The truck started up ok, I tried locking and unlocking the doors with the remote, even trying the panic button with no avail. If anyone could please tell me if they know what could be causing this please let me know!! Thank you!!

 

I know this happens when the battery is bad and on it's way out.

 

I would also clean all grounds in the kickpanels .Then all main grds .

 

The alarm system has the ability to flash the lights. You may have a faulty anti-theft system. There is also a flasher relay under the driver side dash, but that only controls the flashers.

 

Does it have a hood-open sensor? If so you might want to bypass it to see if the problem stops.

 

Do you have LED lights installed? Did your heat sync fall into your taillight and disconnect? I had a similar problem happen with fuses blowing along with the flashing lights. I did end up buying a LED flasher module relay and installed it under the steering wheel; solved all the problems.