Actron AutoTroubleShooter CP7677 User Manual download pdf (Page 10)

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working on printed circuit boards.

• Cut wire if there is no other pos-

sible way to open electrical circuit.

4. Connect RED test lead to one side

of disconnected circuit.

5. Connect BLACK test lead to re-

maining side of disconnected cir-

cuit.

6. Turn multimeter rotary switch to

10A DC position, or 200mA posi-

tion.

7. View reading on display.

If minus (-) sign appears on display,

then reverse RED and BLACK test

leads.

Testing for Continuity

Continuity is a quick way to do a resis-

tance test to determine if a circuit is

open or closed. The multimeter will beep

when the circuit is closed or shorted, so

you don’t have to look at the display.

Continuity checks are usually done when

checking for blown fuses, switch opera-

tion, and open or shorted wires.

To measure Continuity (see Fig. 12):

Fig. 12

Black

Red

Fig. 10

Black

Red

Electrical

Device

DC

Voltage

Source

Fig. 11

Black

Red

Electrical

Device

DC

Voltage

Source

1. Insert BLACK test lead into COM

test lead jack.

2. Insert RED test lead into

test lead jack.

3. Turn multimeter rotary switch to

function.

4. Touch RED and BLACK test leads

together to test continuity.

Listen for tone to verify proper op-

eration.

5. Connect RED and BLACK test

leads across component where

you want to check for continuity.

Listen for tone:

• If you hear tone – Circuit is closed

or shorted.

• If you don’t hear tone – Circuit is

open.

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