8M0026760 Mariner SEAL

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Schematic for the lamps Test Step 1. Inspect the Electrical Connectors and the Wiring
Remove the electrical power from the ECM.
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Typical engine view (1) J1/P1 ECM connector
Thoroughly inspect connectors (1) and (2). Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
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P1 terminals for the indicator lamps (P1-28) Diagnostic indicator lamp (P1-29) Warning indicator lamp () Return
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the indicator lamps.
Check the allen head screw on each ECM connector for the proper torque. Also, check the allen head screw on the customer connector for the proper torque. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
Check the harness and wiring for abrasions and for pinch points from the indicator lamps to the ECM.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The connectors and wiring appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem in the connectors and/or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check for Normal Operation of the Lamp
Restore the electrical power to the ECM and monitor the indicator lamps.Expected Result:The indicator lamps turn on for five seconds. Then, the indicator lamps turn off.Results:
OK - The indicator lamps turn on for five seconds. Then, the indicator lamps turn off.Repair: The problem appears to be resolved. The original problem was probably caused by a poor electrical connection. If an intermittent problem is suspected, refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - An indicator lamp does not turn on. Proceed to Test Step 3.Test Step 3. Measure the Voltage at the Lamp Socket
Use a test lamp to check for voltage at the suspect lamp socket within the first five seconds after the electrical power is restored.Expected Result:The test lamp illuminates during the first five seconds after the electrical power is restored.Results:
OK - The test lamp illuminates during the first five seconds after the electrical power is restored.Repair: Replace the bulb.Verify that the repair eliminates the problem.STOP
Not OK - The test lamp did not illuminate during the first five seconds after the electrical power was restored. Proceed to Test Step 4.Test Step 4. Bypass the ECM in order to Test the Lamp Circuit
Fabricate a jumper wire that can be used to connect two terminals at the P1 ECM connector. Crimp connector pins to both ends of the wire.
Disconnect the J1/P1 connectors.
Use the jumper wire to short one leg of the indicator lamp to the appropriate circuit connection. Refer to figure 3 or 1 for the appropriate terminals.
Restore the electrical power to the ECM and observe the indicator lamp.
Remove the jumper wire and observe the indicator lamp.Expected Result:The indicator lamp turns on while the jumper wire is connected to both terminals. The indicator lamp turns off when the jumper wire is removed.Results:
OK - The indicator lamp turns on while the jumper wire is connected to both terminals. The indicator lamp turns off when the jumper wire is removed. The circuit for the indicator lamp is functioning properly.Repair: Perform the following procedure:
Connect the J1/P1 connectors.
Restore the electrical power to the ECM and monitor the indicator lamps.The indicator lamps should turn on for five seconds. Then, the indicator lamps should turn off.If the indicator lamps turn on for five seconds, the problem is resolved. Return the engine to service.STOP.
If the indicator lamps do not turn on for five seconds, there may be a problem with the ECM.If the problem is not resolved, replace the ECM. Refer to electronic troubleshooting Troubleshooting, "Replacing the ECM".STOP
Not OK - The indicator lamp does not turn on while the jumper wire is connected to both terminals. There is a problem in the wiring for the indicator lamp. There may be a problem in a connector.Repair: Repair the lamp circuit. Verify that the repair eliminates the problem.STOP