DDEC TROUBLESHOOTING
4. Measure voltage from socket C (red lead) of 5-way power harness connector to a good
ground.
[a] If the voltage measurement is greater than 11.5 volts on all readings,
refer to section 10.2.18.
[b] If the voltage measurement is less than 11.5 volts on any readings,
refer to section 10.2.16.
Figure 10-2
5-Way ECM Power Harness Connector
10.2.16 ECM Power Line Check
Perform the following steps to check if the ECM power lines are open:
1. Measure voltage between battery side of one ECM fuse or circuit breaker (red lead)
and a good ground (black lead).
2. Measure voltage at other ECM fuse or circuit breaker. Note that battery side does not
contain #240 or #241 wires. See Figure 10-3.
[a] If the voltage measurement is less than 11.5 volts on any reading,
refer to section 10.2.17.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
10-9
