Ford 10-Cut Lock Cylinder & Key Diagram - Ignition Lock Set Part Numbers
Reference · 1980-1986 BroncoAll 26 blueprints
TSB 87-24-2 General Door & Ignition Lock Service Tips
Publication date: 12/04/87
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.
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.
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
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Part of 1980-1986 Ford Bronco Blueprints
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Frequently asked questions
- How do I determine which Ford ignition lock set to order using this diagram?
- Measure the cut depth at the Number 6 tumbler station on the customer's key (16.85mm from the reference point). Match the measurement to a letter: 5.35mm = A, 4.70mm = B, 4.05mm = C, 3.40mm = D, 2.75mm = E, then order the lock set with that letter suffix.
- What are the ignition lock set part numbers for Thunderbird/Cougar?
- E6SZ-11582-A, E6SZ-11582-B, E6SZ-11582-C, E6SZ-11582-D, and E6SZ-11582-E, chosen by the letter code measured from the key.
- What are the ignition lock set part numbers for Lincoln Town Car and Aerostar?
- E6VZ-11582-A, E6VZ-11582-B, E6VZ-11582-C, E6VZ-11582-D, and E6VZ-11582-E.
- How many tumbler stations does this key system have?
- Ten tumbler stations, numbered 1 through 10, with station 6 used for the depth measurement.
- What cut depth corresponds to code C?
- A measured depth of 4.05mm at the Number 6 tumbler station corresponds to letter C.
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