Blower Motor - Operates Erratically

88ford31

^ AIR CONDITIONING - "ATC" - BLOWER MOTOR OPERATES ERRATICALLY

^ HEATER - "ATC" - BLOWER MOTOR OPERATES ERRATICALLY

Article No. 88-26-1

MERKUR: 1988-89 SCORPIO

ISSUE: An air conditioning/heater blower motor that runs at high speed only and will not turn "OFF" or will not run at all may be caused by a faulty blower controller module (resistor). There are no "ATC" service codes to assist in diagnosing a faulty blower motor controller.

ACTION: Install a new blower motor controller, (resistor). Refer to the following procedure for service details.

1. Disconnect the negative battery cable.

FIGURE 1:

2. Locate the blower motor controller module cover on the evaporator case in the engine compartment, Figure 1.

3. Remove the three (3) screws that hold the blower motor controller module cover to the evaporator case, Figure 1.

4. Using a flat blade screwdriver, gently pry the cover open.

5. Disconnect the blower motor controller module electrical connector.

6. Remove the blower motor controller module and cover assembly.

7. Obtain a new blower motor controller module, E7RY-18591-A.

8. Reverse Steps 1 through 6 to install the new blower motor controller module.

PART NUMBER PART NAME CLASS

E7RY-18591-A Blower Motor Controller
Module C


OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION: 882601A
TIME: 0.5 Hr.
DLR. CODING: Basic Part No. 18591
Condition Code: 09
OASIS CODES: 2600, 2610, 2611, 2630, 2632