[birdy]

Aloha from Paradise. Just purchased 91 5.0, and am in process of electrical restoration. Power locks did not work. Pulled switches from doors and tested for continuity. Both switches tested fine. Reinstalled both switches, nothing. BUT, if I take the plastic covers off of either switch and depress electrical contact manually, then both lock soleniods respond in both direstions. What's up with this????

 

[GhostDog 5.0]

If I remember correctly, both switches must be good for the power locks to work. I would try to find new power lock switches at a junkyard and give that a shot. A lot of fords used the same switches during that year.

If you get real desperate you can cut the tab off of either side and install it on the other.