climate control problems, blower and EATC?

[lifespeed]

A couple months ago my air doors in the HVAC started moving around, changing with engine load (vacuum), so I thought EATC vacuum leak or similar problem. Planned to fix it, but still worked enough, not the highest priority . . . ;).

Now two months after the onset of the air door problem, my climate control fan has stopped running. The control unit in the dash doesn't have visible problems, but I need to do some electrical checks. The fuse for the HVAC under the dash is good. I am checking the Ford manual for the locations of the blower relay and blower motor connector to probe for voltage and shorts. Does this 2004 car still use blower resistors? :(


I must say I'm getting tired of Ford electrical problems, with the faulty ignition coils, flickering heater switch light and failed LCM headlight and lighting relays (!). But I digest.

If any of this blower problem and/or air door problem sounds familiar to anybody don't hesitate to point me in the right direction.

[tbone]

Both of these issues are well documented on here. Just do a search and you will find the answers. Very easy fixes.

[Timw286]

Both of these issues are well documented on here. Just do a search and you will find the answers. Very easy fixes.

Haha yes and I have yet to fix mine!:eek:

[Blackened300a]

Tap the blower control module on the firewall behind the passenger side cam cover with the blower fan on high. That should kick it back on. I have to do that every so often when my blower stops working.

[lifespeed]

Tap the blower control module on the firewall behind the passenger side cam cover with the blower fan on high. That should kick it back on. I have to do that every so often when my blower stops working.

Yeah, like the Fonz! I'll tap it and see if I can't replace it after that. The O-rings for the air door control solenoid leak is pretty obvious.

Sounds like the blower control relay is flaky. I can hear a relay click when I move the fan control from med to high, but no response from the blower.

[screamn]

I had the same issues with the fan not working at all in the A/C or vent modes and I got tired of tapping on the module but kinda relieved some fustration though.

Fastblackmerc sold me one of his rebuilt BCM and it works like a champ. Might want to send him a PM.

Thank you Jim. :beer:

[fastblackmerc]

Actually you DIGRESS... DIGEST is what happens when you eat something :D

Sounds like a bad BMC, like Paul said tap it... it it comes on then that is the problem....

[lifespeed]

I've got 12V on the pink wire going to the blower motor. I believe the blower control switches the ground side of the motor? I feel the blower motor relay behind the passenger cam cover click, but no blower response. Do I need to do any further diagnostic before replacing the O-rings and blower motor relay?

[lifespeed]

Actually you DIGRESS... DIGEST is what happens when you eat something :D

Sounds like a bad BMC, like Paul said tap it... it it comes on then that is the problem....

Tapping it didn't help. Maybe I need to eat something.

[fastblackmerc]

I've got 12V on the pink wire going to the blower motor. I believe the blower control switches the ground side of the motor? I feel the blower motor relay behind the passenger cam cover click, but no blower response. Do I need to do any further diagnostic before replacing the O-rings and blower motor relay?

The relay is most likely shot.

[SC Cheesehead]

The relay is most likely shot.

Yup, sounds that way.

[lifespeed]

New BCM and blower works again. Wife is happy. Now for the EATC solenoid O-rings . . .