1993 Ford Thunderbird blower stuck on high

1993 FORD THUNDERBIRD
Avatar
STOOPID
  • MEMBER
  • 2 POSTS
Heater problem
1993 Ford Thunderbird 6 cyl Two Wheel Drive Automatic
----------------------------------------------------------------
all functions of heat/ac work correctly but blower stuck on high. Replaced ECC unit in dash, replaced blower relay mounted under blower, also pulled plug on blower to check for internal short, blower is working correctly. My wiring diagram only shows systems using the rotary blower speed switch, not the ECC setup my car has. Any ideas would be appreciated
Apr 6, 2008 at 4:17 PM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
You forgot the AC/Heater blower motor resistor this one controls the speed of the blower motor by dropping resistances or increasing it test it out see below


https://images.2carpros.com/forum/automotive_pictures/12900_blower_resistor_6.jpg

Apr 7, 2008 at 3:42 AM
Avatar
STOOPID
  • MEMBER
  • 2 POSTS
thanks for your reply, the blower relay that I replaced is also called the blower resistor. It has been replaced with a new one from Ford....
Apr 7, 2008 at 4:13 AM
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
I've verified it-its the same thing-Check the EATC Module. All the wires at the resistor other than the orange and red wire which is the power input to the motor and black wire to ground are coming from the EATC Module-
Apr 7, 2008 at 8:08 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle