F 250 4WD Super Duty V10-6.8L VIN S (2001)
Use 73 Digital Multimeter to check for continuity between terminal 85 and all other terminals. If resistance is 5 ohms or less between terminal 85 and
any other terminal, replace the relay. If resistance is greater than 5 ohms, continue with the test. Using two jumper wires, connect relay terminals 86 and
20 directly to the positive battery terminal. Set 73 Digital Multimeter in the volts position and check for voltage at terminal 87A. If battery voltage is not
indicated, replace the relay. If battery voltage is indicated, connect a third jumper wire to terminal 85 and ground the jumper wire to a known good
ground. Check for voltage at terminal 87. If battery voltage is not indicated, replace the relay.
