ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
TEST OR INSPECTION
17. ENGINE COMPRESSION BRAKE DOES NOT WORK -CONTINUED.
Although KEY SWITCH must be on and battery ground cable connected to test electrical
circuit voltage, turn off KEY SWITCH and disconnect battery ground cable before doing
resistance tests or replacing parts. This will keep you from getting shocked and prevent
damage to parts and equipment.
Pull wire connector (1) off output terminal (2) on throttle switch (3) and pull three wire connectors (4, 5,
and 6) off cylinder head connectors (7). Set multimeter to ohms scale and adjust to 0 ohms. Connect
red test lead to wire connector (1) and black test lead to wire connector (4). Check for 0 ohms on
multimeter. Disconnect test leads.
If multimeter reads no continuity, 24 wire (8) must be replaced. Notify Direct
If multimeter reads 0 ohms, push three wire connectors (4, 5, and 6) onto cylinder
head connectors (7) and push wire connector (1) onto output terminal (2).
Disconnect jumper wire and replace engine compression break pressure gage
(page 2-683). If engine compression brake still does not work, notify Direct Support