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Q:

AC BLOWER MOTOR NOT WORKING on 2000 Mercury Grand Marquis

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BLOWER MOTOR NOT WORKING, TOOK IT OUT AND HAVE POWER ON HOT WIRE BUT NO GROUND. PUT FIRE TO MOTOR OUTSIDE AND IS WORKING. WOULD THE RESISTOR MODULE MAKE ME LOOSE MY GROUND?
(2) Answers
Yes, the resistor and switch control the ground side.

here is a link to an online repair manual site that will have the info that you need:

http://bit.ly/mitchell_repair_manuals_online
JUST REPLACE IT