41591A 3 WIRING HARNESS ASSEMBLY, ENGINE Mercury
1070312BC, 1070717, 10754120D
WIRING
Price: query
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Number on catalog scheme: 24
Mercury entire parts catalog list:
- ELECTRICAL COMPONENTS » 41591A 3
- ELECTRICAL COMPONENTS » 41591A 3
- ELECTRICAL COMPONENTS » 41591A 3
Information:
Troubleshooting (Indicators, Controls & Air Inlet Heater)
Troubleshooting can be difficult. The Troubleshooting Index gives a list of possible problems. To make a repair to a problem, make reference to the cause and correction on the pages that follow.This list of problems, causes, and corrections will only give an indication of where a possible problem can be, and what repairs are needed. Normally, more or other repair work is needed beyond the recommendations in the list.Remember that a problem is not normally caused only by one part, but by the relation of one part with other parts. This list is only a guide and cannot give all possible problems and corrections. The service technician must find the problem and its source, then make the necessary repairs. For each problem, a list of possible causes and corrections is given. The list of probable causes and corrections should be performed in numeric sequence.1. Contactor Switch For Water Temperature Does Not Activate Alarm.2. Contactor Switch For Water Temperature Activates At Wrong Temperature.3. Contactor Switch For Oil Pressure Does Not Activate Alarm.4. Electrical Indicators Give Wrong Readings.5. Air Inlet Heater.Troubleshooting Problems
Problem 1: Contactor Switch For Water Temperature Does Not Activate Alarm. Probable Cause:* Wrong Connections* Failure Of Alarm* Low Water Level In Cooling System* Wrong Setting Of Switch1. Wrong Connections: Check connections and wiring. Correct where necessary.2. Failure Of Alarm: Check alarm for proper operation.3. Low Water Level In Cooling System: Fill the cooling system.4. Wrong Setting Of Switch: Make a test of temperature setting and if necessary install new contactor switch with correct setting. See specifications. Problem 2: Contactor Switch For Water Temperature Activates At Wrong Temperature. Probable Cause:* Wrong Setting Of Switch1. Wrong Setting Of Switch: Make a test of temperature setting and if necessary install new contactor switch with correct setting. See specifications. Problem 3: Contactor Switch For Oil Pressure Does Not Activate Alarm. Probable Cause:* Wrong Connections* Failure Of Alarm* Wrong Setting Of Switch1. Wrong Connections: Check connections and wiring. Correct where necessary.2. Failure Of Alarm: Check alarm for proper operation.3. Wrong Setting Of Switch: Make a test of temperature setting and if necessary install new contactor switch with correct setting. See specifications. Problem 4: Electrical Indicators Give Wrong Readings. Probable Cause:* Wrong Connections* Sending Units Have A Failure* Wrong Sending Unit In System* Wrong Indicator1. Wrong Connections: Check connections and wiring. Correct where necessary.2. Sending Units Have A Failure: Check the sending units and install new ones if necessary.3. Wrong Sending Unit In System: Install correct sending unit.4. Wrong Indicator: Install correct indicator. Problem 5: Air Inlet Heater: Probable Cause:* Heater Stays On Longer Than Allotted Time - Any Cycle* Heater Does Not Come On* System Check Lamp TestPre-Heat CycleCrank Heat CycleRegular Heat/Run CycleHeater Element CheckCoolant Sensor CheckOil Pressure Switch Check Probable Cause:1. Heater Stays On Longer Than Allotted Time-Any Cycle: Replace the air inlet heater control module. Note: Cycle times are approximate only. Some variance does not necessarily indicate a system failure.2. Heater Does Not Come On: Check for the following:* a defective heater control module.* a defective oil pressure switch (regular heat cycle only).* a defective coolant sensor.* a defective heater element.* a defective power relay (magnetic switch).* a poor connection or damaged wire
To avoid personal injury (burns), make sure the coolant temperature is below 38°C (100°F) before performing any tests.
3. System Check: The procedures that follow are step-by-step diagnostic checks that must be performed in sequence. Failure to do so may result in incorrect diagnosis and unnecessary expense.3(A). Lamp Test: a. Inspect the lamp, replace if necessary.b. Check lamp wiring harness for a cut/broken wire or poor connection.c. If after inspecting the lamp and harness the lamp still does not illuminate proceed with the cycle tests that follow. If the coolant temperature is below 35 4°C (95 7°F), the system should go directly from the lamp test into the pre-heat cycle (light will not turn off).3(B). Pre-Heat Cycle: With the help of a co-worker, turn the key switch to the "ON" position or the ignition switch to the "RUN" position and feel the power relay (magnetic switch) for a "click", indicating the relay is energized. The air inlet heater magnetic switch will normally be located inside the junction box. If no click is felt when the switch is turned to the "RUN" position, proceed as follows: It may be necessary to reset the ignition switch (turn off then back on), periodically while preforming these diagnostic checks. The pre-heat cycle times out in thirty seconds and any tests performed after that period will lead to an incorrect diagnosis.a. Disconnect the electrical connector at the control module. Attach a voltmeter between terminal "F" and terminal "A"
Troubleshooting can be difficult. The Troubleshooting Index gives a list of possible problems. To make a repair to a problem, make reference to the cause and correction on the pages that follow.This list of problems, causes, and corrections will only give an indication of where a possible problem can be, and what repairs are needed. Normally, more or other repair work is needed beyond the recommendations in the list.Remember that a problem is not normally caused only by one part, but by the relation of one part with other parts. This list is only a guide and cannot give all possible problems and corrections. The service technician must find the problem and its source, then make the necessary repairs. For each problem, a list of possible causes and corrections is given. The list of probable causes and corrections should be performed in numeric sequence.1. Contactor Switch For Water Temperature Does Not Activate Alarm.2. Contactor Switch For Water Temperature Activates At Wrong Temperature.3. Contactor Switch For Oil Pressure Does Not Activate Alarm.4. Electrical Indicators Give Wrong Readings.5. Air Inlet Heater.Troubleshooting Problems
Problem 1: Contactor Switch For Water Temperature Does Not Activate Alarm. Probable Cause:* Wrong Connections* Failure Of Alarm* Low Water Level In Cooling System* Wrong Setting Of Switch1. Wrong Connections: Check connections and wiring. Correct where necessary.2. Failure Of Alarm: Check alarm for proper operation.3. Low Water Level In Cooling System: Fill the cooling system.4. Wrong Setting Of Switch: Make a test of temperature setting and if necessary install new contactor switch with correct setting. See specifications. Problem 2: Contactor Switch For Water Temperature Activates At Wrong Temperature. Probable Cause:* Wrong Setting Of Switch1. Wrong Setting Of Switch: Make a test of temperature setting and if necessary install new contactor switch with correct setting. See specifications. Problem 3: Contactor Switch For Oil Pressure Does Not Activate Alarm. Probable Cause:* Wrong Connections* Failure Of Alarm* Wrong Setting Of Switch1. Wrong Connections: Check connections and wiring. Correct where necessary.2. Failure Of Alarm: Check alarm for proper operation.3. Wrong Setting Of Switch: Make a test of temperature setting and if necessary install new contactor switch with correct setting. See specifications. Problem 4: Electrical Indicators Give Wrong Readings. Probable Cause:* Wrong Connections* Sending Units Have A Failure* Wrong Sending Unit In System* Wrong Indicator1. Wrong Connections: Check connections and wiring. Correct where necessary.2. Sending Units Have A Failure: Check the sending units and install new ones if necessary.3. Wrong Sending Unit In System: Install correct sending unit.4. Wrong Indicator: Install correct indicator. Problem 5: Air Inlet Heater: Probable Cause:* Heater Stays On Longer Than Allotted Time - Any Cycle* Heater Does Not Come On* System Check Lamp TestPre-Heat CycleCrank Heat CycleRegular Heat/Run CycleHeater Element CheckCoolant Sensor CheckOil Pressure Switch Check Probable Cause:1. Heater Stays On Longer Than Allotted Time-Any Cycle: Replace the air inlet heater control module. Note: Cycle times are approximate only. Some variance does not necessarily indicate a system failure.2. Heater Does Not Come On: Check for the following:* a defective heater control module.* a defective oil pressure switch (regular heat cycle only).* a defective coolant sensor.* a defective heater element.* a defective power relay (magnetic switch).* a poor connection or damaged wire
To avoid personal injury (burns), make sure the coolant temperature is below 38°C (100°F) before performing any tests.
3. System Check: The procedures that follow are step-by-step diagnostic checks that must be performed in sequence. Failure to do so may result in incorrect diagnosis and unnecessary expense.3(A). Lamp Test: a. Inspect the lamp, replace if necessary.b. Check lamp wiring harness for a cut/broken wire or poor connection.c. If after inspecting the lamp and harness the lamp still does not illuminate proceed with the cycle tests that follow. If the coolant temperature is below 35 4°C (95 7°F), the system should go directly from the lamp test into the pre-heat cycle (light will not turn off).3(B). Pre-Heat Cycle: With the help of a co-worker, turn the key switch to the "ON" position or the ignition switch to the "RUN" position and feel the power relay (magnetic switch) for a "click", indicating the relay is energized. The air inlet heater magnetic switch will normally be located inside the junction box. If no click is felt when the switch is turned to the "RUN" position, proceed as follows: It may be necessary to reset the ignition switch (turn off then back on), periodically while preforming these diagnostic checks. The pre-heat cycle times out in thirty seconds and any tests performed after that period will lead to an incorrect diagnosis.a. Disconnect the electrical connector at the control module. Attach a voltmeter between terminal "F" and terminal "A"