AC/heat fan blower not working

2003 MERCURY MARQUIS

144,000 MILES • 4.6L • 2WD • AUTOMATIC

ELBERT.LEE

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Fan will not blow AC/heat.

Nov 4, 2017 at 6:40 PM

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STRAILER

AUTOMOTIVE REPAIR CONTRIBUTOR
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It sounds like one of two things has happened either you have a blower motor that is out or the fuse is out. We must check for power at the blower motor and fuse to determine which. Here are two guides and some blower motor wiring diagrams so we can get the problem fixed.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

and

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

I just noticed a relay in the system as well.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Here are the diagrams (below)

Please run some tests and get back to us.

Cheers, Ken

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Nov 6, 2017 at 12:50 PM