ELECTRICAL GENERAL MAINTENANCE INSTRUCTIONS - CONTINUED
ELECTRICAL GROUND POINTS
Many electrical problems are the result of poor ground connections. Ensure ground connections are good by performing
the following steps.
Although master battery switch must be ON to test electrical circuit voltage, turn master battery
switch to OFF position before performing resistance tests or replacing parts. Failure to follow this
warning may result in injury to personnel and damage to parts or equipment.
Remove screw, lockwasher, nut, etc., connecting ground wire terminal to vehicle ground point.
If necessary, clean mounting hardware, wire terminal, and ground point with detergent and a scrub brush.
Remove any rust or corrosion from ground point with a wire brush and abrasive cloth.
Replace defective mounting hardware and wire terminal as necessary.
Install wire terminal to ground point with screw, lockwasher, nut, etc., and tighten securely.
. The Multimeter, Digital (Item 73, WP 0289 00)
to troubleshoot the electrical system
of the vehicle.
voltage levels at any point in the electrical system.
. Continuity tests are performed
to check for
breaks in a circuit
(such as a fuse, switch, light bulb,
If digital readout will not zero properly, replace batteries and repeat zeroing procedure. If digital
readout will not zero after batteries have been replaced, notify your supervisor.
Zero the Multimeter.
Press OHMS FUNCTION switch (44).
Press LOWEST VOLTAGE/OHMS selector switch (48).
Touch black and red probes (49 and 50) together and check for a zero reading on digital readout (42).