Question about 2004 Mercury Grand Marquis
Hi & lo speed, delay, & washer work as usual. I can't shut wipers off. Wiper motor has been professionally replaced (3) times.
I had the same problem. The problem is in the switch (wiper, turn signal, hi-beam, hazard switch - multi-function switch). The part number is S14349 from BWD. My wipers wouldn't turn off and sometimes headlights wouldn't turn on unless I held the hi-beam switch back for about 5 seconds. After I changed the multi-function switch, the wipers still came on twice, but have been fine since (about a month). I don't know if it helped, but after I changed the switch, I pulled the top cover off the wiper motor housing (under hood against firewall right in front of driver - you have to remove hood weather stripping on top of firewall), checked the electrical connection to motor and also pulled up on ground strap checking the make sure I had good contact with the grounding strap. After I checked all that, the wipers came on once by themselves but I could actually turn them off and they have been fine since (don't know if there was some type of memory that caused the wipers to come on after I changed the switch, but they have been fine since then). Hope this is helpful.
Posted on Feb 23, 2009
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Posted on Jan 02, 2017
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