1998 Mercury Grand Marquis Wiring Diagram Starting System. 1996-2001 SABLE 1998-2000 MYSTIQUE 1998-2001 GRAND MARQUIS 1999-2001 COUGAR 1998-2002 MOUNTAINEER This TSB article is being republished in its entirety to update the model year vehicles and the NOTE diagnostic procedures. Thankfully this is an easy fix.
Thankfully this is an easy fix. Contrary to popular belief Ford Lincoln and Mercury vehicles do not come equipped from the factory with a standard alarm system. Look at the dashboard and locate the theft system light.
Wait for 10 to 15 minutes until.
Fortunately the process only takes a few minutes to complete so you will be on the road again quickly. Click on document MERCURY GRAND MARQUIS wiring diagram. How do I disable the alarm on my 1998 Mercury Grand Marquis so I can start my car. Mercury Grand Marquis 1998.