74607A 3 Mercury PISTON PIN TOOL

General Wiring
Illustration 1 g01024452
Basic connections for the power and the controls
Table 1
Customer Connector (40 Pin)    
Pin Number    Function    Engine Harness Wire (Identification)    
1     Positive Battery Power     150-OR-14    
2     Positive Battery Power     150-OR-14    
3     Shutdown Notify Relay (Power)     E798-PK    
4     Air Shutoff Solenoid (Power)     G971-BR    
5     Start Enable Relay (Power)     F701-BR    
6     Local Cat Data Link (Negative Power)     892-BR    
7     Local Cat Data Link (Positive Power)     893-GN    
8     General Alarm Relay (Power)     F700-BU    
9     Digital Sensor Return     998-BR    
10     Engine Speed Input (Throttle)     F702-GN    
11     Oil Temperature Sensor (Signal)     D839-YL    
12     Global Cat Data Link (Negative Power)     J982-OR    
13     Global Cat Data Link (Positive Power)     J981-WH    
14     Load Feedback     J782-GN    
15     Oil Temperature Sensor (Return)     200-BK    
16     Engine Shutdown (Signal "D")     F719-BR    
17     Engine Shutdown (Signal "C")     F715-PU    
18     N/A     G721-GY    
19     Air Temperature Sensor (Signal)     B472-YL    
20     Air Temperature Sensor (Return)     200-BK    
21     Torque Limit (Signal) (Fuel Position Multiplier)     G746-WH    
22     Ether Relay (Return)     F710-GN    
23     start/run/stop Switch "1"     F716-WH    
24     start/run/stop Switch "2"     F717-YL    
25     Diagnostic Lamp (Power)     F404-RD    
26     Prelube Pressure Switch     F718-BU    
27     ECM (Key Switch Input)     113-OR    
28     Magnetic Speed pickup (Signal)     SPD1-BK    
29     Magnetic Speed pickup (Return)     SPD2-CL    
30     Magnetic Speed pickup (Shield)     SPDS-SH    
31     CAN Data Link (Positive Power)     F711-GN    
32     CAN Data Link (Negative Power)     F712-GY    
33     CAN Data Link (Shield Ground)     A249-BK    
34     Negative Battery Power     229-BK-14    
35     Negative Battery Power     229-BK-14    
36     Prelube Pump Relay (Power)     F705-PK    
37     Prelube Pump Relay (Return)     A268-BK    
38     Ether Switch (Manual Override)     F720-PU    
39     Engine Protection Switch (Override)     N917-RD    
40     Torque Limit (Overspeed Verify Switch)     F706-PU    
Illustration 2 g01026018
Illustration 2 shows the details of the power supply for the Electronic Control Module (ECM) and of connections to other components and systems on the vehicle. The connections for the power supply and for the engine throttle control must be made in order to have a engine system that functions.Empty contact cavities in the customer's harness connector must be plugged in order to keep moisture out.Refer to the Electrical Schematic from the engine Service Manual for specific wire identifications and functions.Power Requirements and Grounding Considerations (Pins 1, 2, 27, 34, and 35)
Grounding Considerations
Improper grounding can cause uncontrolled or unreliable electrical circuit paths and electrical noise. This can also result in damage to the engine bearings or other engine components.