Why would the A/C blower stop working after hitting a pothole?

Tiny
JOHNNY RYMAN
  • MEMBER
  • 2003 JAGUAR S-TYPE
  • V8
  • AUTOMATIC
  • 190,000 MILES
Hit a pothole, hard bump and the A/C blower stopped working.
Thursday, August 11th, 2022 AT 7:15 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

The first thing I need you to do is check fuse 16 in the engine compartment fuse box. In addition to checking the fuse, confirm there is power to and from it. If that is good, remove the blower motor relay and reinstall a different one from the box having the same part number to see if it works.

If there isn't one with the same part number.

Here is a link that explains how to test a relay:

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

If that checks good, I need you to locate the blower motor under the dash and disconnect the connector to it. There will be a red wire with a black tracer that should have power. Confirm that for me.

Let me know what you find. Also, let me know if the blower motor was making any strange sounds before you hit the bump.

I attached the wiring schematic below, so you have a reference. Additionally, here is a link that you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Take care,

Joe

See pics below. Note: The schematic page was cut in half to make it readable for you. I overlapped the two pics so you can follow from one to the next. The last pic shows the fuse to check, and I highlighted the blower motor relay (BMR).
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Thursday, August 11th, 2022 AT 9:26 PM

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