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Old 12-12-2010, 14:05   #1 (permalink)
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1989 Mercury Grand Marquis OBD connector location

Hello,

I recently bought my 89 grand marquis, and I have issues with heating inside. I have a feeling the thermostat has been removed from my car, but I would like to check the engine temps with OBD first before tearing it apart. The issue is that I cannot find it. Actron manual points to left fender skirt, clymer manual points to passenger side fender by strut cover, but I just cannot find it. Please advise.

Thanks!
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Old 12-17-2010, 18:57   #2 (permalink)
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Re: 1989 Mercury Grand Marquis OBD connector location

located driver side under the hood... along fender by washer reservoir... it is a big plug and a smaller single wire plug... it is OBD 1 setup in your car
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