Originally Posted by Jzinkiewicz

vechilcle security module. My door ajar light is on again after replacing the instrument cluster for $700. The wd-40 is not the solution. It's the vsm.
Originally Posted by RAMPAGE_F350
If you have this combination of problems your VSM(Vehicle Security Module) is bad:
Door lock switches inside the truck don't work.
The dome light will not go out even while driving.
The auto headlights don't work.
The door locks will not auto lock at 5mph.
The radio stays on with the key out and the door is open.
The alarm works intermitantly.
The door ajar light will not come on with any door open.

Off the top of my head guzzle, jverba and myself have had the VSM replaced. Upon researching the Electrical Systems and Wiring Forum I found three other guys that replaced their VSM. This is where I noticed that all six of us had 2002 modle trucks! Coincidence?! I'm not saying its an epidemic, just sharing my thoughts.