SOURCE: 2001 mercury grand marquis
Check under the dash at your Brake pedal interlock switch. It is timed with the gearshift Interlock and Ignition switch. This switch usually gets hit by feet and dislodged or broken. When you shift out of Park, the switch is toggling to a broken piece and shorting out.
The brake interlock switch is at the top half of the pedal lever. The other part of the Interlock uses a rod or cable in the steering column Ignition switch and mates with the shifting mechanism.
SOURCE: heater and airconditioner control on mercery grand marquis
If the fan will not run on ANY speed in your Grand Marquis, the problem is most likely NOT the control switch.
Check for power and ground at the blower motor connector. If power and ground is present, replace the blower motor. Otherwise, the problem is most likely a failed blower speed control module (VERY common). The blower motor speed controller is located in the A/C evaporator housing just below the heater hoses.
Note: It is also common for a bad blower motor to CAUSE the controller to go bad. You MAY have to replace BOTH.
SOURCE: 2001 mercury Grand Marquis won't start engine
my mercury grand marquise turns over but wont start what could it be. would a fuse keep it from starting?
97 views
Usually answered in minutes!
×