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remove steering column, pull back dash to passenger front seat, you do not have to dis-assemble entire dash panel. You can access plenum (heater box)this way.
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∙ 18y ago
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Troubleshoot headlamps on 1988 grand marquis?
troubleshoot head lamps on 1988 grand marquis? Not working...fuses OK
Where is fuse for tail lights in 1988 Mercury Grand Marquis?
where is the fuse for tail lights in 1988 mercury grand marquis
Where are the hidden bolts for the 1988 grand marquis heater core?
this is what i,d like to no to why cant anyone give a good dam answer 2 this question
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You need to know the stereo wiring diagram for an 1988 mercury grand marquis?
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It is about 1/2 way between the engine and tank under the car. It is a simple matter of removing it and replacing it.
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Its behind the cover of the intake you can replace it without removing the cover if you have the right tool should be about a 5/16
