Question about 2004 Mercury Grand Marquis
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Posted on Jan 02, 2017
Have seen this problem before. You need to look under dash at brake pedal and find a blue switch with plunger contacting pedal, disconnect connector and jump with a peice of wire and drive to see if cruise works and if it does replace deactivation switch this should get you going.
Posted on Aug 26, 2009
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.
Posted on May 17, 2012
How do I find the replacement for the cruise control brake disconnect switch for the 2004 Grand Marquis? I have disconnected and shorted and CC engages fine. Can't find a replacement part though.
Posted on Jan 06, 2013
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