TM 5-3805-255-14
0020
ELECTRICAL GROUND POINTS
00020
Many electrical problems are the result of poor ground connections. Ensure ground connections are good by per-
forming the following steps.
WARNING
Although batteries must be connected to test electrical circuit voltage, disconnect batteries
before performing resistance tests or replacing parts. Failure to follow this warning may
result in injury to personnel.
a. Remove screw, lockwasher, nut, etc., connecting ground wire terminal to vehicle ground point.
b. If necessary, clean mounting hardware, wire terminal, and ground point with detergent and a scrub brush.
c.
Remove any rust or corrosion from ground point with a wire brush and abrasive cloth.
d. Replace defective mounting hardware and wire terminal as necessary.
e. Install wire terminal to ground point with screw, lockwasher, nut, etc., and tighten securely.
MULTIMETER USAGE
00020
1. General. The multimeter used to troubleshoot the electrical system of the vehicle. The multimeter's Ohms
scale is used to test for continuity, shorts, and resistance and the voltmeter scale is used to test voltage levels
at any point in the electrical system.
2. Continuity Tests. Continuity tests are performed to check for breaks in a circuit (such as a fuse, switch, light
bulb, or electrical cable).
0020-9
