A/C, Instruments - Operate Intermittently
Article No.90-4-5
01/14/90
^ AIR CONDITIONING - BLOWER MOTOR - INTERMITTENT LOSS OF ELECTRICAL POWER
^ INSTRUMENT CLUSTER - INTERMITTENT LOSS OF ELECTRICAL POWER
FORD:
1986-89 TAURUS
LINCOLN-MERCURY:
1986-89 SABLE
This article is being republished in its entirety to expand the coverage to include 1989 Taurus/Sable vehicles.
ISSUE:
An air conditioning/heater blower motor, instrument cluster or other electrical accessories that operate intermittently may be caused by the ignition switch wire harness terminals overheating. The # 687 accessory power circuit becomes inoperative when the ignition switch and mating wire harness connector terminals overheat. This condition occurs more frequently on vehicles with 50,000 or more miles.
ACTION:
Install a new ignition switch wire harness modification kit that is more resistant to electrical loads. Refer to the following procedure for service details.
1. Disconnect the negative battery terminal.
2. Remove the ignition switch from the vehicle. Refer to the appropriate Taurus/Sable Shop Manual, Section 31-20 for service details.
NOTE:
DISCONNECT THE "PRNDL" CABLE BEFORE DROPPING THE STEERING COLUMN. REFER TO THE APPROPRIATE TAURUS/SABLE SHOP MANUAL, SECTION 13-04 FOR SERVICE DETAILS.
Figure 1:
3. Remove the eight (8) wire terminals from the 14401 ignition switch connector, Figure 1.
Figure 2:
4. Cut the two (2) "YELLOW" wires six (6) inches (152 mm) from the ignition switch wire harness connector, Figure 2.
5. Cut the "YELLOW/GRAY" wire seven and a half (7.5) inches (191 mm) from the ignition switch wire harness connector, Figure 2.
6. Strip 1/8 of an inch (3 mm) of insulation from the ends of the three wires.
7. Using butt splice connectors, crimp the three ignition switch wires to the new service connector and wire harness assembly as follows:
a. "YELLOW" ignition wire to "B1" service harness
b. "YELLOW/GRAY" ignition wire to "A2" service harness
c. "YELLOW" ignition wire to "B2" service harness
Refer to TSB 86-3-11 for butt splice instructions.
8. Install the five (5) remaining ignition switch wire terminals into the new ignition switch connector as shown in Figure 2.
9. Install the new ignition switch connector wedges and tape the area of repair with electrical tape.
10. Install the new ignition switch and plug in the new ignition switch connector.
NOTE:
REINSTALL AND ADJUST "PRNDL" CABLE AFTER THE STEERING COLUMN HAS BEEN REPOSITIONED.
11. Reconnect the negative battery cable.
PART NUMBER PART NAME CLASS
E8OY-11572-A Ignition Wire Harness BG
Modification Kit
OTHER APPLICABLE ARTICLES: 86-3-11
SUPERSEDES: 88-26-2
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
900405A Install Ignition Wire 1.4 Hrs.
Modification Kit
DEALER CODING
BASIC PART NO. CONDITION CODE
11572 28
OASIS CODES: 2100, 2160, 2300, 2400, 2630, 2632,2900