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Richard, Mercury Technician
Category: Mercury
Satisfied Customers: 15311
Experience:  12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.
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2005 mercury grand marquis..airbag light flashes 3-3-3-4 when

Resolved Question:

2005 mercury grand marquis..airbag light flashes 3-3-3-4 when starting car up. then stays on constantly until the next time the car is started.
Submitted: 6 years ago.
Category: Mercury
Expert:  Richard replied 6 years ago.

Hello and welcome to


The code 33 and 34 are for both the driver and passenger pretensioners. The pretensioners are built into the seat belt retractors. You will need a Ford factory scan tool to diagnose the restraint system but you can install a 2.5 ohm resistor in place of the seat belt pretensioner. If the code does not come back on then you need to replace that pretensioner.

Customer: replied 6 years ago.

assuming you are correct, how much should i expect to pay for this repair? ballpark figure is fine.


where does the resistor go? can i do the repair myself?


thank you for your prompt reply. i will gladly pay $!5 for your input.





Expert:  Richard replied 6 years ago.
If you have two faulty belt retractor/pretensioners they list for about $188.00 new from Ford and the labor to replace each is no more than one hour. The test you can do is to disconnect the seat belt pretensioner and install the resistor in place. You need to remove that B pillar trim to access the seat belt.
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