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Mini ISO Relay Test

WARNING: This page is about a different car, the 2002 Ford Pickup, 2002 Ford Econoline, 2002 Ford Cutaway, and 2002 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: This test applies to PCM power relay, cooling fan low relay (if equipped), A/C WOT cutout relay (if equipped) and fuel pump (valve) relay. For cooling fan high relay testing and all cooling fan circuit testing, see TEST KF: FAN CONTROL RELAY under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article.
  1. Remove relay. Check relay continuity. Continuity should exist between relay terminals No. 85 and 86, and between relay terminals No. 30 and 87a. See Fig 1. Continuity should not exist between relay terminals No. 30 and 87. If continuity is as specified, go to next step. If continuity is not as specified, replace relay.
  2. Using a jumper wire, apply battery voltage to relay terminal No. 85. Using a second jumper wire, ground relay terminal No. 86. Continuity should now exist between relay terminals No. 30 and 87. If continuity is not as specified, replace relay. If continuity is as specified, relay is okay at this time.
Fig 1: Identifying Mini ISO Relay Terminals
G97D28186Courtesy of FORD MOTOR CO.
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