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Lock Motor Differences
IF THE IMAGE IS TOO SMALL, click it.
The early lock motors are prone to water intrusion; both in the motor itself, and in the spiral BB mechanism, causing poor performance, high current draw, & eventual failure. They were used in F-series/Bronco FRONT doors until '91, and crew-cab REAR doors until '97.
But by changing the connector & the mounting bracket, the later motor can be swapped in. It's possible to R&I the early motor simply by accessing the door interior. But for the later motor (with Z-bent pushrod), the door latch must also come out.
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