2003 Grand Marquis fuse box diagram

Asked by GuruCWZ8S Feb 09, 2019 at 08:30 AM about the 2003 Mercury Grand Marquis

Question type: Maintenance & Repair

The blower for the heat and cool will not work

1 Answer
42,950

Hornet_2497 answered 5 years ago

Go to the under the dash fuse block and check fuse #15. Then go to the under the hood fuse block and check fuse #103, a 40 amp fuse. Also in this fuse block check/replace relay #301. Do one at a time until you find it. I think it will be fuse #103. It could also be the motor or a loose plug to the motor. Tell us what you find.

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