215634
10
Revision B
1017623
A
Figure 1.21: Firewall Extension Module
•
Firewall extension module (A)
Two connectors: P235 and P236
Location: Behind the cab, near the header lift/fan
manifold
To disconnect the connectors, insert the end of a a small
3
–
6 mm (1/8
–
1/4 in.) blade screwdriver into the
connector
’
s locking tab. Gently pry upward (no more
than 6 mm [1/4 in.]) to unlock the connector tab, and
then pull the connector away from the module.
1017624
A
Figure 1.22: Chassis Extension Module
•
Chassis extension module (A)
Two connectors: P247 and P248
Location: Under the cab, inside the left frame rail
To disconnect the connectors, insert the end of a small
3
–
6 mm (1/8
–
1/4 in.) blade screwdriver into the
connector
’
s locking tab. Gently pry upward (no more
than 6 mm [1/4 in.]) to unlock the connector tab, and
then pull the connector away from the module.
1019753
A
B
C
C
Figure 1.23: Engine Control Module
•
Engine Control Module (ECM)
Two connectors for Cummins: P100 (A) and J1 Cummins
Proprietary ECM Connector (B)
Location: On the engine
To disconnect the connectors, pull the rubber boot off of
the cover, unlock the latch, and undo the main over-
center latch. Remove strain relief bolts (C) so that the
connectors can be pulled away from the ECM.
IMPORTANT:
Be sure to disconnect both connectors. Note the
connector locations for reinstallation.
IMPORTANT:
Be sure to reconnect the connectors in the proper
locations. Do
NOT
cross connect the connectors.
