What should I do if my Mercury Mariner wont start?
What should I do if my Mercury Mariner wont start? Grab your voltmeter and yank the starter relay. You’ll be testing the terminals in the relay socket. Look at the bottom of the relay to find the terminal number and locate those same terminals in the socket. With the key turn to the START position, you should see battery voltage on terminals 2 & 3. Where is the starter relay on a Mercury Mariner? Ford uses an antitheft system to tell the PCM to energize a starter relay located in the battery Junction box. The image shown here is from...