Lull 6K Service Manual User Manual
Page 561
Transmission
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
8-13
Fig. 8-5: DW-3 Signal/Wire Combinations for a 4WG-100 Transmission
No power at Red or
Violet Wires
7. If no power is present at Red or Violet wires, check for the following:
a. Park brake is on or the park brake pressure switch is closed when it
should be open.
b. Transmission declutch switch is in the “ON” position and the
service brake pressure switch is stuck closed.
c. Boom is above 40° or the proximity switch relay is not being
energized by proximity switch.
d. Proximity switch is not sensing metal or connector at switch is
loose or disconnected.
e. Transmission declutch relay (37657X):
iii. Check for continuity between pin 30 and pin 87A.
iv. Check resistance between pin 86 and 85: approximately 82 W
v.
Check ground connection to pin 85.
f.
7.5 amp fuse and fuse holder.
g. Ignition Relay (37383X):
i.
Check resistance between pin 86 and pin 85: 76 W
E1011