TM 9-2350-238-20-1
Make sure MASTER switch is OFF before repairing
electrical circuits. Failure to observe this warning
could result in injury to personnel.
Step 2.
Disconnect leads 459 at disconnect behind driver's instrument (switch)
panel. Place red probe in lead 459 (terminal end) and ground black probe.
Set MASTER switch ON. If multimeter indicates no voltage, repair lead
459 (terminal end) from MASTER switch to disconnect. Refer to page
2-371. Set MASTER switch OFF. Connect leads 459 at disconnect
behind driver's instrument (switch) panel.
2-103