GUARD 3Y7447 - Caterpillar

Table 1
Resistance Measurements for the Power Supply    
Terminal Strip Connection    Terminal Strip Connection    
5 (−Battery)     1 (+Battery)    
2 (+Battery)
102-107 (Keyswitch)
Measure the resistance between terminal strip connection 5 and the engine block surface.Perform the following procedures on engines that are equipped with a 70 pin connector and a EMCP II.
Measure the resistance between the following connections:
Table 2
Resistance Measurements for the Power Supply    
70 Pin Connection    EMCP II Connections    
44 (−Battery)     Emergency Control Switch    
RM1
Measure the resistance between terminal 44 and terminal 3 of the 70 pin connector.
Measure the resistance between terminal 44 and 3 and the engine block surface.Expected Result:Each check of the resistance is greater than 2 Ohms.Results:
OK - Each check of the resistance is greater than 2 Ohms. The wiring for the power supply does not have a short circuit. Proceed to Test Step 4.
Not OK - At least one check of the resistance is less than 2 Ohms.Repair: Repair the wiring, when possible. Replace parts, if necessary. Verify that the