SOURCE: 1989 Mercury Topaz Transmission problem !!!
overdrive should be activated by a solenoid ..internal and perhaps an external one also.. in 89 the computer was primitive and i dont think controlled shift points..also if engine health is bad or missing or vacuum to any cacuum modulator at trans is damaged or compromised.. these issues could occur...good luck
SOURCE: Cruise Control - 2000 Mercury Grand Marquis LS - not working
Your manual should tell you that. Also check your brake light switch by the brake pedal. It also disengages the cruise. If it is bad the cruise will not work but the brake lights may still work.
SOURCE: Cigarette lighter doesn't work in my 1998 Mercury Grand Marquis
sounds like the lighter itself is bad because the fuse for the lighter is the same as the fuse for the connecter in which the inspection machine plugs in to.
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SOURCE: 2001 Mercury grand marquis' keyless entry pad is
Same problem on my 2000. Apparently moisture gets into the pad and shorts it out. The constant lock/unlock and lights flashing (also headlights comin on if you have them on automatic) will run the battery down in no time. I solved it temporarily by unplugging the keypad plug behind the door trim. That will still give you the door lock/unlock funtions from your remote. Only fix is to replace the pad.
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