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1992 Mercury Grand Marquis LS windshield wipers not working. I've replaced the motor itself and the multi function switch. When I turn the switch on, I hear a relay clicking sound from behind the dash. The washer pump does work. I've also replaced the 8.25a circuit breaker. I'm not sure where else to turn on this. Any suggestions would be greatly appreciated.

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All my diagrams do not show an external relay, but is does show in interval wiper/washer module that could be bad. No clue where it is.

enter image description here

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  • That's gotta be it. There's four parts on that diagram, and the OP has replaced three of them. The only other explanation would be a bad ground.
    – SteveRacer
    Commented Mar 22, 2019 at 3:27

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