Doors and Ignition - Lock Service Tips

Article No.
87-24-2

12/04/87

LOCKS - DOORS AND IGNITION - GENERAL LOCK SERVICE TIPS

FORD:
1987-88 ESCORT/EXP, TEMPO, MUSTANG, TAURUS, THUNDERBIRD, CROWN VICTORIA

LINCOLN-MERCURY:
1987 LYNX
1987-88 TOPAZ, SABLE, COUGAR, GRAND MARQUIS, MARK VII, CONTINENTAL, LINCOLN TOWN CAR

LIGHT TRUCK:
1987-88 AEROSTAR, RANGER, BRONCO II, E-SERIES, F-SERIES, BRONCO

ISSUE:
Two types of key systems are used on Ford vehicles. The five (5) bit key system uses one (1) key to operate the ignition lock and a second to operate the outside door locks. The ten (10) bit key system uses one (1) key to operate the ignition lock and the outside door locks. The ten (10) bit key system services the ignition lock as a separate service part so the door locks would not have to be replaced in the event of an ignition lock failure.

ACTION:
If service is required for the five (5) bit key system, the ignition and door locks are serviced separately. Refer to the appropriate Shop Manual for removal and installation procedures. If service is required for the ten (10) bit key system, a ten (10) bit ignition lock with partially cut keys is available. Refer to the following service procedure.

NOTE:
Customers concerned with the heads of the new ten (10) bit ignition service keys not matching the original keys may be resolved by ordering blank keys from Rotunda. Cut the two (2) blank keys ordered from Rotunda on tumbler station numbers 1, 2, 3, 4, and 6 to match the new ten (10) bit ignition service keys supplied with the new service ignition lock.

1. Remove the ignition lock cylinder. Refer to the appropriate Shop Manual.

FIGURE 2:

2. Using the Ford Rotunda key code cutting package, tool number 011-00003, measure the depth of the cut on the number six (6) tumbler station of the original key. Use this measurement to determine the correct service ignition lock set. Refer to the chart in Figure 2.

3. Using the original ignition key, decode tumbler station numbers 5, 7, 8, 9, and 10.

4. Cut the new service key on tumbler station numbers 5, 7, 8, 9, and 10.

5. Check the operation of the new service key in the new ignition lock and outside door locks.

6. Install the new service ignition lock.

NOTE:
Retain both the original and new service key tabs for future key code identification.

OTHER APPLICABLE ARTICLES: 86-23-4

WARRANTY STATUS: "INFORMATION ONLY"