Question about 1994 Mercury Grand Marquis
The switch is making the changing postion noise.
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Posted on Jan 02, 2017
replace the wiper relay.
Posted on Jan 02, 2009
remove wiper arm and check splines on wiper motor or splines on wiper arm for damage if damaged replace. Sometimes arms are just installed with a nut and this nut over time becomes loose check tightness.
Posted on Oct 20, 2009
For the 3.0L on the 1998 Mercury Sable:
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Posted on Apr 01, 2010
SOURCE: wipers come on when the
The multifunction switch is the problem. All of the Wiper controls are in the lever. To replace this switch you need to remove the plastic cover on the Column, possibly remove the Ignition switch, and take off 2 Torx screws holding the part to the column. Be careful removing the Electric connectors from the switch as the Tabs are fragile.
The Ignition switch has a chrome decor flare on it which may hamper removal of the plastic column cover. If you can't get the cover off without removing the Keyswitch, you need to disconnect the Battery, turn the key to Acc. or Run and then poke a pin under the Keyswitch at an opening that's provided. Using your keys the Ignition core will pull straight out. Follow the above instructions.
Then reverse the process and reassemble your car.
I hope my solution is very helpful for solving your problem.
Posted on Feb 18, 2011
Tips for a great answer:
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Body control module (BCM)
Wiper 1 relay
Wiper 2 relay
Windshield wiper motor
Windshield washer pump
Windshield washer nozzles
Windshield washer solvent container
Windshield wiper arm and blade assemblies
Windshield wiper transmission
WIPER/SW 10A fuse
WIPER 25A fuse
The body control module (BCM) controls the wiper motor based on input from the windshield wiper washer switch. The BCM monitors the wiper washer switch through three separate signal circuits and a ground circuit. The windshield wiper switch high signal circuit is used to determine high speed wiper operation, the windshield wiper switch low signal is used to determine low speed, intermittent, and mist operation through the use of a resistor ladder, and windshield washer switch signal circuit is used to determine washer operation. The windshield wiper motor park operation is controlled by the BCM. The BCM recieves an input from the park switch to determine wiper blade position. When the wiper blades are at the bottom of the windshield glass in park position the wiper park switch will open and the circuit will be pulled up to B+ by the BCM. The park signal will be pulled to ground by the wiper motor park switch while the wiper blades are not in the park position.
The BCM controls the windshield wiper motor through two output controls, controlling two relays which determine the desired wiper speed, high or low
Diagnostic Trouble Codes (DTCs)
The body control module (BCM) monitors the voltage on the windshield wiper switch signal 2 circuit for diagnostic purposes. If the circuit is shorted to voltage while the driver is commanded OFF, the BCM will store DTC B3715. If the circuit is shorted to ground while the driver is commanded ON, the BCM will store DTC B3715. Refer to DTC B3715.
It would be best to have a factory scan tool to diagnose this problem . it would make it easier anyway .
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