How do you replace ignition lock cylinder on a 1987 Grand marquis?
On the steering column, underneath the key cylinder is a small spring-loaded metal button. This is the retaining latch. a small phillips screwdriver or other metal object is used to press in this button and release the cylinder. The cylinder will then slide out. There is usually a single wire connection for the key reminder buzzer. Disconnect this and the cylinder can be removed. Replacement cost at AutoZone is approx. $20. The new part goes back in reverse order(reconnect wire,slide cylinder in till latch engages).
