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How to R&R ECM 95 Merc. Grand Marquis

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May 8, 2012, 5:16 PM

Post #1 of 2 (1698 views)
How to R&R ECM 95 Merc. Grand Marquis Sign In

1995 Mercury Grand Marquis GS, 140,000 miles

Question: how do I go about removing and replacing the ECM on a 1995 Mercury Grand Marquis? The main thing I want to know is the ECM is located below and to the right of the master cylinder recessed into the firewall with the connector showing on the engine compartment side, when I remove the connector does the ECM come out into the engine compartment or does it come out under the dash?

Ultimate Carjunky / Moderator
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May 8, 2012, 5:38 PM

Post #2 of 2 (1686 views)
Re: How to R&R ECM 95 Merc. Grand Marquis Sign In

Yep, that is where it is at. It comes out underneath the dash. You don't have to remove the nuts on the grommet on the outside. There is a clip on the inside that you take off to slide the PCM out of the hole after removing the connector.

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