1999 Crown Vic AC

[keely111]

Okay, glove compartment came out without resorting to sawzall.

On the botton right is what appears to be a vacuum actuated door. The actuator and door move fine.

On the top rear left of my view through the glove box

Click here for a pic of what I see looking inside the glove box to the top left at about the 10 o'clock position.




I do not feel any vibration when resting my hand on it with key on, motor off and a/c on. Wiggled the connector slightly to insure it's on tight.

Is that the offender?

Short of calling on our friend the sawzall is there any way to replace this without pulling the dash?

Many thanks,

John Keely

[way2old]

It is held on with 2 or 3 screws.(Book shows 4). They say to remove the dash. You might be able fo feel around in there nd find the mounting bolts. If not, time to remove dash. Not a lot of room to get in there. You might want to get a test light and see if current is going to it when the a/c is engaged. If you want the test, here it is.
As an afterthought, Have we checked the fuses yet?


PINPOINT TEST A: DTC B1249: BLEND DOOR FAILURE
CONDITIONS DETAILS/RESULTS/ACTIONS
A1 CHECK THE ACTUATOR CLOCKWISE OPERATION (FULL COOL)




EATC Module C227 and C228


Connect a jumper lead between the EATC module connector Pins C228-26, Circuit 246 (P) and C227-2, Circuit 54 (LG/Y). Connect a second jumper lead between the EATC module connector Pins C228-13, Circuit 245 (BR/LG) and C227-3, Circuit 57 (BK).


Does the blend door actuator motor drive clockwise?
Yes
GO to A2.

No
GO to A3.
A2 CHECK THE ACTUATOR COUNTERCLOCKWISE OPERATION (FULL HOT)

Connect a jumper lead between the EATC module connector Pins C228-13, Circuit 245 (BR/LG) and C227-2, Circuit 54 (LG/Y). Connect a second jumper lead between the EATC module connector Pins C228-26, Circuit 246 (P) and C227-3, Circuit 57 (BK).


Does the blend door actuator motor drive counterclockwise?
Yes
GO to A8.

No
GO to A3.
A3 CHECK CIRCUIT 246 (P) FOR A SHORT


Electronic Blend Door Actuator C282


Measure the resistance between the EATC module connector Pin C228-26, Circuit 246 (P) and ground.


Is the resistance reading greater than 10,000 ohms?
Yes
GO to A4.

No
REPAIR Circuit 246 (P) for a short to ground. TEST the system for normal operation.
A4 CHECK CIRCUIT 245 (BR/LG) FOR A SHORT TO GROUND

Measure the resistance between the EATC module connector Pin C228-13, Circuit 245 (BR/LG) and ground.


Is the resistance reading greater than 10,000 ohms?
Yes
GO to A5.

No
REPAIR Circuit 245 (BR/LG) for a short to ground. TEST the system for normal operation.
A5 CHECK CIRCUIT 246 (P)/298 (P/O) FOR AN OPEN

Measure the resistance between the EATC module connector Pin C228-26, Circuit 246 (P) and the electronic blend door actuator connector Pin C282-7, Circuit 298 (P/O).


Is the resistance reading less than 5 ohms?
Yes
GO to A6.

No
REPAIR Circuit 246 (P)/298(P/O) for an open. TEST the system for normal operation.
A6 CHECK CIRCUIT 245 (BR/LG)/208(GY) FOR AN OPEN

Measure the resistance between the EATC connector Pin C228-13, Circuit 245 (BR/LG) and the electronic blend door actuator connector Pin C282-8, Circuit 208 (GY).


Is the resistance reading less than 5 ohms?
Yes
GO to A7.

No
REPAIR Circuit 245 (BR/LG)/208(GY) for an open. TEST the system or normal operation.
A7 CHECK THE ACTUATOR OPERATION
Remove the electronic blend door actuator; refer to Section 412-04.


Electronic Blend Door Actuator C282


With the actuator drive shaft disengaged from the temperature blend door, drive the electronic blend door actuator full hot; refer to Step A1.

With the actuator drive shaft disengaged from the temperature blend door, drive the electronic blend door actuator full cool; refer to Step A2.


Does the blend door actuator drive both clockwise and counterclockwise?
Yes
REPAIR the temperature blend door for a blocked or binding condition. TEST the system for normal operation.

No
INSTALL a new electronic blend door actuator. TEST the system for normal operation.
A8 CHECK THE FEEDBACK POTENTIOMETER TOTAL RESISTANCE

Drive the electronic blend door actuator full cool; refer to Step A2.

Measure the resistance between the EATC module connector Pins C227-6, Circuit 436 (R/LG) and C228-9 Circuit 438 (R/W).


Is the resistance reading between 5,000 and 7,000 ohms?
Yes
GO to A13.

No
GO to A9.
A9 CHECK CIRCUIT 436 (R/LG)/600(DB) FOR AN OPEN


Electronic Blend Door Actuator C282


Measure the resistance between the EATC module connector Pin C227-6, Circuit 436 (R/LG) and the electronic blend door actuator connector Pin C282-6, Circuit 600(DB).


Is the resistance less than 5 ohms?
Yes
GO to A10.

No
REPAIR Circuit 436 (R/LG)/600(DB) for an open. TEST the system for normal operation.
A10 CHECK CIRCUIT 438 (R/W) FOR AN OPEN

Measure the resistance between the EATC connector Pin C228-9, Circuit 438 (R/W) and the electronic blend door actuator connector Pin C282-5.


Is the resistance reading less than 5 ohms?
Yes
GO to A11.

No
REPAIR Circuit 438 (R/W) for an open. TEST the system for normal operation.
A11 CHECK CIRCUIT 436 (R/LG) FOR A SHORT

Measure the resistance between the EATC module connector Pin C227-6, Circuit 436 (R/LG) and ground.


Is the resistance reading greater than 10,000 ohms?
Yes
GO to A12.

No
REPAIR Circuit 436 (R/LG) for a short to ground. TEST the system for normal operation.
A12 CHECK CIRCUIT 438 (R/W) FOR A SHORT

Measure the resistance between the EATC module connector Pin C228-9, Circuit 438 (R/W) and ground.


Is the resistance reading greater than 10,000 ohms?
Yes
INSTALL a new electronic blend door actuator. TEST the system for normal operation.

No
REPAIR Circuit 438 (R/W) for a short to ground. TEST the system for normal operation.
A13 CHECK THE FEEDBACK POTENTIOMETER LOW SIDE RESISTANCE

Drive the electronic blend door actuator full cool; refer to Step A2.

Measure the resistance between the EATC module connector Pins C228-9, Circuit 438 (R/W) and C227-18, Circuit 437 (Y/LG).


Is the resistance between 250 and 1,500 ohms?
Yes
GO to A16.

No
GO to A14.
A14 CHECK CIRCUIT 437 (Y/LG) FOR AN OPEN


Electronic Blend Door Actuator C282


Measure the resistance between the EATC module connector Pin C227-18, Circuit 437 (Y/LG) and the electronic blend door actuator connector Pin C282-1.


Is the resistance reading less than 5 ohms?
Yes
GO to A15.

No
REPAIR Circuit 437 (Y/LG) for an open. TEST the system for normal operation.
A15 CHECK CIRCUIT 437 (Y/LG) FOR A SHORT TO GROUND

Measure the resistance between the EATC module connector Pin C227-18, Circuit 437 (Y/LG) and ground.


Is the resistance reading greater than 10,000 ohms?
Yes
INSTALL a new electronic blend door actuator. TEST the system for normal operation.

No
REPAIR Circuit 437 (Y/LG) for a short to ground. TEST the system for normal operation.
A16 CHECK THE FEEDBACK POTENTIOMETER HIGH SIDE RESISTANCE

Drive the electronic blend door actuator full cool; refer to Step A2.

Measure the resistance between the EATC module connector Pins C227-6, Circuit 436 (R/LG) and C227-18, Circuit 437 (Y/LG).


Is the resistance reading between 3,500 and 6,000 ohms?
Yes
GO to A17.

No
INSTALL a new A/C electronic blend door actuator. TEST the system for normal operation.
A17 CHECK CIRCUIT 436 (R/LG) FOR A SHORT TO GROUND

Measure the resistance between the EATC module connector Pin C227-6, Circuit 436 (R/LG) and ground.


Is the resistance reading greater than 10,000 ohms?
Yes
GO to A18.

No
REPAIR Circuit 436 (R/LG) for a short to ground. TEST the system for normal operation.
A18 CHECK CIRCUIT 438 (R/W) FOR A SHORT TO GROUND

Measure the resistance between the EATC module connector Pin C228-9, Circuit 438 (R/W) and ground.


Is the resistance reading greater than 10,000 ohms?
Yes
GO to A19.

No
REPAIR Circuit 438 (R/W) for a short to ground. TEST the system for normal operation.
A19 CHECK CIRCUIT 437 (Y/LG) FOR A SHORT TO GROUND

Measure the resistance between the EATC module connector Pin C227-18, Circuit 437 (Y/LG) and ground.


Is the resistance reading greater than 10,000 ohms?
Yes
INSTALL a new EATC module. TEST the system for normal operation.

No
REPAIR Circuit 437 (Y/LG) for a short to ground. TEST the system for normal operation.

[keely111]

Just 50 easy steps right?...chuckle.

I'll assume my pic shows I've found the beast.

I did check fuses for a/c but, per chance is there a separate one for this motor...or is it powered by a different fuse than the a/c?

I've decided to sacrifice my knuckles for the $300 for cracking open the dash.

I'm going in............

[keely111]

Is it possible to remove just the top of the dashboard and get to this little fella or am I looking at pulling the steering wheel and the whole instument panel.

Any tips? I can't see anywhere to pop the top of the dash.

Thanks,

[way2old]

No easy way to do it. Just remember where everything came from. I will tie a rope to ya. If you get ate by the beast, yell nad I will jerk you out of the cavern. If you are careful, you can remove just enough so the dash tilts back on the seat and does not have to be completely removed. The steering column is held up by 4 bolts and can be dropped down without removing it completely. Not a lot of fun though.

[keely111]

What book might you recommend that will walk me baby step by baby step through the dash removal and reinstallation process?

Since I'll probably save $300 in labor on the job I figure it's worth $20 to know the right way to do it as opposed to just jumping in. I have visions of the airbag blowing up as I remove the last screw (chuckle).

Thanks,

John Keely

[keely111]

What book might you recommend that will walk me baby step by baby step through the dash removal and reinstallation process?

Since I'll probably save $300 in labor on the job I figure it's worth $20 to know the right way to do it as opposed to just jumping in. I have visions of the airbag blowing up as I remove the last screw (chuckle).

Thanks,

John Keely

[way2old]

Haynes or Chilton will give you a good enough explanation as how to remove dash. Tried to get pics to post. Site will not allow pics. PM me with your e-mail. Will send text to ya. It is another 50 easy step removal and 50 easy step installation.