Malfunctioning door locks

2005 PONTIAC GRAND PRIX
140,000 MILES
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JTORRESANI
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I own a 2005 Grand Prix GT - in the mornings the doors will not lock using the FOB or inside door switches. However after running the vehicle for a few hours the door locks work again. This only happens when trying to lock the doors, they always open... weird.
Sep 21, 2012 at 3:55 AM
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DRCRANKNWRENCH
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It could be the door lock switches. When they are cold resistance in the circuit increases and as they get warmer it decreases. So, they are probably slowly failing, as a lot of electrical switches do, and aare in need of replacement.
Sep 21, 2012 at 4:11 AM