F 150 2WD Pickup V6-4.2L VIN 2 (1997)
Micro ISO Relay
Use a 73 Digital Multimeter to check for continuity between terminal 2 and all other terminals. If resistance is 5 ohms or less between terminal 2
and any other terminal, replace the relay. If resistance is greater than 5 ohms, continue the test. Use two jumper wires to connect relay terminals 1
and 3 directly to the positive battery terminal. Set in volts position and check for voltage at terminal 4. If battery voltage is not indicated, replace
the relay. If battery voltage is indicated, connect a third jumper wire to terminal 2 and ground the jumper wire to a known good ground. Check for
voltage at terminal 5. If battery voltage is not indicated, replace the relay.
