TM-9-2320-273-20

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE

NOVEMBER 1980

TM-9-2320-273-20 - Page 424 of 1500

TM 9-2320-273-20

5-6. TEST EQUIPMENT (Continued).

c.

Continuity Tests.

Continuity tests are made to check for breaks in a circuit (such as the

switch, light bulb, or electrical cable illustrated). To make a continuity check (’Fig. 5-5), do the

following steps:

Failure to perform the following step can damage the multimeter.

(1)

Disconnect the circuit being tested. To be safe, disconnect the battery ground strap.

(2)

Set up and “zero” the multimeter.

(3)

Connect the meter probes to both terminals of the circuit being tested. (The

TS-352B/U is illustrated below, but the probes are connected to the circuit the same way with each

of the three multi meters.)

Figure 5-5. Making a Continuity Check

(4)

Look at the meter needle.

(a)

If the needle swings to the far right over the “O” on the top scale (on all

three multimeters), the circuit has continuity.

(b)

If the needle doesn’t move, the circuit is open (broken).

(c)

If the needle jumps

or

flickers, there is a loose connection in the circuit being

tested,

TA 074694

5-8