Lull 6K Service Manual - Manual (Page 570)

Transmission
8-22 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
3. Using a DMM set to meter resistance, test for resistance between
blade 86 and blade 85. A Bosch brand relay should meter 85 ±5 W. A
Potter & Brummfield brand relay should meter 90 ±10% W.
4. Connect a 12 volt lead to blade 86. Connect a ground lead to blade 85.
Using a DMM set to test continuity, test for continuity between blade 30
and blade 87.
Note:With 12 volts at blade 86 and blade 85 grounded, continuity between
blade 30 and blade 87 must be present; if not, replace the relay.
5. Disconnect the 12 volt lead to blade 86. Using a DMM set to test
continuity, test for continuity between blade 30 and blade 87A.
Note:With no 12 volt signal at blade 86, continuity between blade 30 and
blade 87A must be present; if not, replace the relay.