Except Safety Relay
Turn ignition on. Ensure power to relay exists. Turn ignition off. Disconnect connector from relay being tested. Using ohmmeter, check for relay winding continuity across appropriate relay terminals. See WIRING DIAGRAMS at the end of this article to identify proper relay terminals (wire colors) for testing. Energize relay and check continuity of relay output circuit.
EXAMPLE: Maxima Fuel Pump Relay
- Turn ignition on. Ensure battery voltage exists at Blue wire of fuel pump relay. See Fig 1 . If battery voltage is not present at Blue wire, check for a blown 10-amp power fuse or an open circuit between fuse and relay.
- Turn ignition off. Unplug fuel pump relay. Check for continuity across Blue wire and Blue/White wire terminals. If continuity does not exist, relay is defective. If continuity exists, connect ohmmeter leads across Orange wire and Black wire terminals. Energize relay by applying battery voltage to Blue wire terminal and ground to Blue/White wire terminal. Ensure continuity exists while relay is energized.