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2005 Mercury Mountaineer - Page 7 Questions & Answers
How to reset airbags light on mercury mounteneer
The airbag light comes on if the airbag computer detects a trouble in the system.The only moving part that gives out due to wear and tear is gonna be the"clockspring"in the steering column(this is a printed circuit board on a plastic ribbon that is coiled up so that there will be a solid,reliable connection to the bag,instead of a brush contact that would have resistance).Most manufacturers also use this coil to connect to the horn button (only requires one more conductor).Many times the horn will be inoperative or cuts in and out when you turn the wheel.A steering wheel puller is probably the only special tool you'll need to replace the clockspring.
Heater core one line hot one line cold
Souns to me like the heater core is either "air locked" or plugged. If you haven't done any work on the cooling system lately then toe core is plugged and will have to be replaced. If you were working on the system,then top up the overflow and leave the cap loose for a couple days. This will allow the air to escape but keep it topped up. Remember to keep the heater running when you do this. Hope this helps.
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