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Relay Tests

Remove both connectors to perform relay tests. Relays are located in right front cowl panel. Verify that terminal "1" on each relay is grounded. If not grounded, check relay case-to-ground bolts for tightness. If relay ground bolts are tight and terminals "1" of each relay still do not ground, replace relay. Apply power to terminals "2" and "4" on each relay and connect a 12 volt test light between terminals "1" and "2" and ground (no longer than two minutes). Test light should come on; if not, replace relay.

Fig 1: Ford Power Door Lock Wiring Diagram (Capri, Mustang, Ford, Mercury, Thunderbird & XR7)
G09316965Courtesy of FORD MOTOR CO.
Fig 2: Ford Power Door Lock Wiring Diagram (Cougar, Granada, Fairmont, Zephyr, Lincoln Town Car & Mark VI)
G09316966Courtesy of FORD MOTOR CO.