Question about 1999 Mercury Mountaineer

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Battery I have a 1999 mercury mountaineer and today the amp guage just shot up. After that the abs and battery light came on. The car was working fine though and a few miles down the road, the guage went back down but the 4 wheel drive selector light kept blinking every so often. What could be the problem?

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Have alternator checked ...also  be  sure  battery  cables at battery are secure..especially the  ground  side ....good luck

Posted on Nov 18, 2008


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2002 mercury mountaineer speedometer not working. When you start it speedometer goes to 50mph regardless of what speed you traveling. Then when you turn it off it goes to 30 then slowly return to 0.

Any warning lights lit on the insturment cluster ? ABS
Vehicle Speed Signal
The vehicle speed signal is generated by the rear anti-lock brake sensor and sent to the 4-wheel anti-lock brake system (4WABS) module. The 4WABS module sends the vehicle speed signal via circuit 679 (GY/BK) to all systems which require a vehicle speed signal input.
The electronic speedometer receives a speed signal from the 4WABS module.

Take it to a qualified repair shop .

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Have the Alternator output voltage tested, it sounds like low voltage in the electrical system triggered all this.

Jul 09, 2012 | 2004 Mercury Mountaineer

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Battery light and abs light came on then speedometer quit working then it comeplete died. had it jumped off 7 different times. someone said the battery is completely dead. whats going on?


Oct 16, 2011 | 1997 Mercury Mountaineer

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Removed and reinstalled factory radio from a 1999 mercury mountaineer and then the airbag light came on when the vehicle was started, how do i reset the airbag light?

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Jan 10, 2010 | 1999 Mercury Mountaineer

1 Answer

The abs light came on and air conditioner started blowing hot. After work the batt was dead. Jumped it and guages were dead for about 30 sec. About 10 miles later abs light went off and air got cold again....

It sounds like the engine is running on battery power only.The engine of today`s technology needs the alternator to have enough ignition to run on,lights and computer,etc,will be affected by low voltage,and amps.The alternator is not charging,look for a charging fuse to see if it is blown.If the fuse is fine,replace the alternator,and have the battery recharged on a slow 2 amp charge so it will recover it`s loss of deep cycle amps.This will prolong battery life and alternator.If I can help let me know.Let me know the out come.

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