Hi
I bought a 89 Grand Marquis and the power windows need some help. Both passenger side ones go up and down but not all the time. The drivers window doesn't move but you can hear the motor run. The drivers side rear worked the other day but now you can hear the motor but no movement. What do I need to check or replace? I know after market motors are available, do they have everything I need or do I need a lifter as well? I'd like to fix these and the front power door locks and have everything working again.
Thanks Richard