The most likely cause is heating and cooling from the sun causing tailgate wiring to flex while parked, or on bumpy roads This drove me crazy for a year. Also had flashing or flickering "door open" light at times while driving.
Lift the tailgate and carefully pull the plastic trim down across the top area of the glass, just enough to get to the two connectors inside. Separate the two connections and clean/lubricate the connections and reinstall.
According to the 2003 Mercury Mountaineer Owner Guide : ( DOT 3 brake fluid , meeting Ford specification ESA-M6C25-A )
That would be the 4.6 liter engine, which takes six quarts. * of 5W-20 according to the 2003 Mercury Mountaineer Owner Guide
I am pretty sure that it is non existent, i have a 99 mountaineer and it is AWD and i am going to assume that yours has either FWD or AWD which means it has a transmission and a transfer case not a transaxle
I get 15.3 in my 2005.
4
( # 24 ) is a blue color 15 amp fuse for the cigarette lighter and OBD II in a 2003 Mercury Mountaineer ( under the instrument panel )
On a 2003 Mercury Mountaineer , 4.6 litre V8 engine : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
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only when it begins to fail.
Yes.
5.0 quarts 4.7L ( of 5W-30 for the 4.0 liter V6 ) 6.0 quarts 5.7L ( of 5W-20 for the 4.6 liter V8 ) In a 2003 Mercury Mountaineer
The fuel pump is inside the gas tank you have to drop the tank to get it out