DDEC TROUBLESHOOTING
[b] If measured resistance is greater than 10,000 , or open, refer to section 33.3.6.
Figure 33-6
ECM Engine Harness Connector
33.3.6
Check for Short to Battery
Perform the following steps to check for a short to the battery (+):
1. Remove both fuses to the ECM.
2. Disconnect the vehicle harness and 5-way power connector harness at the ECM.
See Figure 33-7.
3. Measure resistance between sockets P1 of the engine harness connector and B3 on the
vehicle harness connector.
4. Measure resistance between socket P1 on the engine harness connector and the 5-way
power harness connector sockets A and C.
[a] If the resistance measurement is less than or equal to 100 , a short exists between
sockets where the measurement was taken. Repair short and reinsert fuses, or reset
breakers. Refer to section 33.3.8.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
33-9
