the voltage regulator in the alternator is going bad it can possibly stick when everything is turn off and drain you battery over night.
On a 2002 Mercury Mountaineer : Put your low beam head lights on and pull the headlight selector switch towards you
Throb Throb was created in 1984.
instrument panel or controls?
check the brake light switch
The first model year of the Mercury Mountaineer sport utility vehicle was 1997 Did you mean 2005 ?
You can view the Mercury Mountaineer owners manuals online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( then select your year , and Mountaineer , etcetera )
Start with the retaining screws at the very bottom of the dash (around the hood release area), then work your way up. It can be tedious, so take your time.
a malfunction has been detected ( could be a sensor )
Constant Throb was created in 1972.
Chart Throb was created in 2006.
If the ((ABS)) Light is on then it's a good thing indicating that the Antilock brakes sensor is in good condition. I too have a 2002 mountaineer
Your head will throb when all is done.