B4000 2WD V6-4.0L SOHC (2003)
Key Reminder Switch: Testing and Inspection
KEY WARNING SWITCH REMOVAL/INSTALLATION
Perform this test when directed to in the diagnostic pin point tests.
1. Measure resistance between terminal 2 and terminals 1, 3, 4 and 5. If resistance is 5 ohms or less between terminal 2 and any other terminal,
replace the relay. If resistance is greater than 5 ohms, go to step 2.
2. Use two jumper wires to connect terminals 1 and 3 directly to the positive battery terminal. Measure voltage at terminal 4. If there is no battery
voltage, replace the relay. If there is battery voltage go to step 3.
3. Connect a third jumper wire to terminal 2 and a known good ground. Measure voltage at terminal 5. If there is no battery voltage, replace the
relay.
