Topaz FWD L4-140 2.3L CFI (1987)
Ignition Switch Lock Cylinder: Technical Service Bulletins
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.
