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Symptom: *CHECKING THE GLOW PLUG OPERATION POSSIBLE CAUSES GLOW PLUGS FUSED B+ CIRCUIT OPEN GLOW PLUG RELAY OUTPUT CIRCUIT SHORTED TO VOLTAGE GLOW PLUG RELAY OUTPUT CIRCUIT SHORTED TO GROUND GLOW PLUG RELAY OUTPUT CIRCUIT OPEN GLOW PLUG RELAY TEST ACTION APPLICABILITY 1 Turn the ignition off. All Yes → Go To 2 No → Go To 3 2 Refer to the Service Information and perform the Glow Plug Test. All Yes → Test Complete. No → Replace the Glow Plug(s) as necessary. Perform ROAD TEST VERIFICATION - VER-2. 3 NOTE: If the Glow Plug Relay fuse or fuselink is open, refer to the system All Yes → Go To 4 No → Repair the Fused B+ (Fuse/Fuselink) circuit for an open. Perform ROAD TEST VERIFICATION - VER-2. 4 Turn the ignition off. All Yes → Repair the Glow Plug Relay Output circuit for a short to voltage. Perform ROAD TEST VERIFICATION - VER-2. No → Go To 5 223 DRIVEABILITY - DIESEL |