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los
08-09-2015, 11:25 AM
I can't get my fan to come on for my a/c... The line is icing up coming from the compressor but no fan blowing . Do you guys think the fan motor went up ?
RF Overlord
08-09-2015, 11:32 AM
Most likely a bad BMSC. Very common. Try tapping it with the handle of a screwdriver or something similar. If that makes the fan come on, PM fastblackmerc...he can fix the BMSC for you. If that doesn't do anything, it still could be a bad module. Try putting 12 volts directly to the blower motor terminals and see if it spins.
los
08-09-2015, 11:58 AM
Most likely a bad BMSC. Very common. Try tapping it with the handle of a screwdriver or something similar. If that makes the fan come on, PM fastblackmerc...he can fix the BMSC for you. If that doesn't do anything, it still could be a bad module. Try putting 12 volts directly to the blower motor terminals and see if it spins.
Thanks ! Will give that a shot...
los
08-09-2015, 12:16 PM
Yep... It spins with 12 volts to it
RF Overlord
08-09-2015, 01:15 PM
Then you likely have a bad BMSC...or less likely an issue with the EATC head unit.
los
08-09-2015, 01:33 PM
Ok... Thanks for the help .
BODYMAN
08-09-2015, 08:38 PM
1 other simple thing to try first also before getting further into it. 2 of my 3 MM's did it also & both of them it was simply the elec plug in to the fan motor assy. Just weren't making good contact as wiring is very short & they just worked them selves loose but appeared to be plugged in. Its a simple thing to ck.
los
08-10-2015, 03:37 PM
1 other simple thing to try first also before getting further into it. 2 of my 3 MM's did it also & both of them it was simply the elec plug in to the fan motor assy. Just weren't making good contact as wiring is very short & they just worked them selves loose but appeared to be plugged in. Its a simple thing to ck.ok ... I'm going to check that tommorow ... I would love for it to be that simple.. It definatly runs with 12 volts to the motor though
Zack
08-10-2015, 07:56 PM
It's the BCM
/thread
los
08-11-2015, 06:35 PM
It's the BCM
/thread
What's the BCM ? How difficult is it to change myself ?
RF Overlord
08-11-2015, 07:02 PM
The BCM (Blower Control Module) is also referred to in the service manual as the BMSC- Blower Motor Speed Control module. It's mounted to the evaporator housing behind the passenger-side head. Kind of a pain to access, since heater hoses are in the way...helps to have nimble fingers and be double-jointed.
BODYMAN
08-11-2015, 08:00 PM
I swore mine was BCM also til I pushed that plug & ever sense its been fine. Mine was prolly a simple 1 in 4000. were it was a simple a problem. But yea I had a bcm on my 2nd 03
los
08-12-2015, 10:26 AM
I checked my plug and it was a no go... I'm going to take it to The dealership and lt them have at it ... That BCM is probably the issue.. I'm not even gonna try changing it myself .. Lol
fastblackmerc
08-12-2015, 10:38 AM
Did you try tapping the BMSC first to see if that's the problem?
los
08-12-2015, 11:54 AM
Did you try tapping the BMSC first to see if that's the problem?
What's the BMSC ?
fastblackmerc
08-12-2015, 01:12 PM
What's the BMSC ?

Have you been reading all the posts in this thread that you created?
Zack
08-12-2015, 01:16 PM
This guy wants to keep his car broken at all costs
fastblackmerc
08-12-2015, 02:44 PM
Have you been reading all the posts in this thread that you created?

Let me give you a hint..............



POST #2
martyo
08-12-2015, 03:26 PM
This guy wants to keep his car broken at all costs

Post of the day!
RF Overlord
08-12-2015, 03:45 PM
See post #11
los
08-19-2015, 04:37 PM
Ford told me it was the automatic temp control assembly
los
08-19-2015, 04:42 PM
Sorry I havnt been back in this thread ... Been super busy with a business I have been trying to get off the ground . But dropped my car off to ford yesterday and they told me it was the automatic temp control assembly .
Zack
08-19-2015, 05:23 PM
Ford is wrong
fastblackmerc
08-19-2015, 05:27 PM
Sorry I havnt been back in this thread ... Been super busy with a business I have been trying to get off the ground . But dropped my car off to ford yesterday and they told me it was the automatic temp control assembly .


Ford is wrong

It's a possibility the EATC is the problem, but it's more likely the BCM.
los
08-19-2015, 05:42 PM
It's a possibility the EATC is the problem, but it's more likely the BCM.

Should I take it to get a second opinion ? It Took them all day to come up with that diagnosis .
Zack
08-19-2015, 06:14 PM
Just wow. You can be the second opinion by tapping on the BCM


This thread is giving me cancer
Turbov6Bryan
08-19-2015, 06:35 PM
What's a BCM?

















I couldn't resist :flamer:
fastblackmerc
08-20-2015, 07:24 AM
Just wow. You can be the second opinion by tapping on the BCM


This thread is giving me cancer

This has been mentioned more than a few times in this thread...............
RF Overlord
08-20-2015, 09:10 AM
It's a possibility the EATC is the problem, but it's more likely the BCM.This.


You can be the second opinion by tapping on the BCMAnd this.
los
08-20-2015, 02:46 PM
Yep ... It ended up being the BCM .. Repaired today ... Thank yall for the help ! Definatly appreciate it !
RF Overlord
08-21-2015, 08:06 AM
Yah, a new BSCM is a lot less expensive than the EATC head unit the dealer wanted to gouge you for.
Kramer1
08-23-2015, 07:35 PM
Yeah my fan started acting up and randomly changing speeds....I replaced my blower control module with a new Motorcraft one. Took about 45mins to swap out! All is well with the world again! Thanks to the wonderful knowledgable people on this forum!