D 150 Ramcharger V8-360 5.9L (1989)
is present at the Z1 wire, proceed to step 3.
3.
Connect the voltmeter to the K14 (terminal 86) wire at the ASD connector. Turn the ignition key to the RUN position. Input voltage from the
SMEC to the ASD relay should be present. If voltage is present proceed to step 4. If no voltage is present, disconnect the 60 way and 14 way
SMEC connectors, and the ASD relay connector. Connect an ohmmeter between the K14 (terminal 86) wire and the DB/WT wire at pin no. 12 of
the SMEC, and check for continuity. If continuity exists, the problem is computer related.
If no continuity exists, repair open in wire, reconnect SMEC and ASD relay, and test operation.
4.
Connect voltmeter to DK19 (terminal 85) wire at ASD connector. Turn ignition key to START position, and CRANK engine, while observing
voltage at DK19. Voltage should be present at DK19 and drop to less than 1 volt within 2 seconds during cranking. If voltage drops ASD relay is
functioning, and no further testing of the ASD relay is necessary. If voltage does not drop, proceed to step 5. If no voltage is present, disconnect
the ASD relay, and connect an ohmmeter between the K14 (terminal 86) and DK19 (terminal 85) of the ASD relay and check for continuity. If no
continuity exists replace and ASD relay and test operation.
5.
Disconnect the 60 way SMEC connector and ASD relay. Connect an ohmmeter between the DK19 wire at the ASD relay connector and the
DB/YL wire at pin connector no. 58 of the SMEC. Check for continuity. If no continuity exists repair open in wire, reconnect SMEC and ASD
relay, and test operation. If continuity exists, the problem is computer related.
