1995 EATC blower runs when I turn the key off.

Kane
Joined
Jan 18, 2023
Thunderbird Year
1995
I put my ShBoom in the garage the other night. When I went over the next day to get it out again, I heard the "noise" in the garage. I couldn't figure out what it was. I went to start the car and the battery was almost dead. Turns out the "noise" I heard was the blower motor running. It turns on when I turn the ignition key off!. I dropped the glove box out of the way and unplugged the blower. When the key is on, the blower operates as it should!
I replaced the "Blower Motor Control Module" and that didn't change it. Please see attached pic of the old one.
This is a 95 with the Electronic Automatic Temperature Control HVAC option.
Thanks in advance. I'm an old guy and not very good at this electronic stuff!
Kane
 

Attachments

  • blower speed controller.jpg
    blower speed controller.jpg
    3.4 MB · Views: 2
74 Harley

74 Harley

Active Member
Joined
Jul 8, 2020
Thunderbird Year
1962
Look in your fuse box for a relay that controls the power to the blower motor, it may have gone bad.
 
Kane
Joined
Jan 18, 2023
Thunderbird Year
1995
Thanks for your reply. I'm trying to figure out how if the relay went "bad" how it would supply current when the key is switched off? Told ya'll that I'm not good at this electronic stuff!
Nice 62 you have! I had a 60 that was a similar color! Takes a real man to drive that around!
Kane
 
74 Harley

74 Harley

Active Member
Joined
Jul 8, 2020
Thunderbird Year
1962
The job of the relay is to use low draw current from the ignition switch to operate the relay, it supplies higher amperage to whatever accessory it is operating.
Essentially the relay could be stuck in the on position.
Thank you for the compliments!
 
Top