99 F250 Powered Locks
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8th Gear
Joined: Sep 2020
Posts: 8
Likes: 0
From: Northeast Wisconsin
99 F250 Powered Locks
Hello. My new to me 99 F250 has been a blast to own. The truck has powered locks, and when I try to use the fob or the buttons on the doors to unlock it, I can hear the motor working, and see the locks move a bit, but it will not cycle between locked and unlocked, or vice versa. It does this on all 4 doors of the vehicle. The key turns the lock fine, and moving the black lock tabs by hand I dont feel any resistance difference than on my fathers 99 F250, which the power locks work on. Not sure if its important or not, but if I press the button/door button rapidly, I get 3-5 'tries' before the motor stops trying to cycle the lock, and it gets weaker every time. Letting it sit for ~7 seconds, and it will try again another 3-5 times. Any thoughts on what I could check or try to make these work without putting the key in the door or moving them by hand? Thanks 
More Turbo
Joined: Nov 2009
Posts: 525
Likes: 274
From: Kansas
Seems like there is a contact in the lock motors that gets weak. It is a thermal switch basically. If the button is held down it gets hot and breaks contact to prevent overheating. These will get weak if they break contact a lot. Google it, seems like it was a relatively easy fix.
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chief1232
1999 - 2016 Super Duty
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May 9, 2022 09:16 AM
