Check For Voltage; Check For Continuity And Resistance - Toyota Hilux Surf 1993 Owner's Manual

BE–4
BODY ELECTRICAL SYSTEM

Check for Voltage

(a) Establish conditions in which voltage is present at
(b) Using a voltmeter, connect the negative (–) lead to

Check for Continuity and Resistance

(a) Disconnect the battery terminal or wire so there is
(b) Contact the two leads of an ohmmeter to each of
If the circuit has diodes, reverse the two leads and check
again.
When contacting the negative (–) lead to the diode pos–
itive (+) side and the positive (+) lead to the negative
(–) side, there should be continuity. When contacting
the two leads in reverse, there should be no continuity.
HINT: Specifications may vary depending on the type of
tester, so refer to the tester's instruction manual before
performing the inspection.
Check LED (Light Emitting Diode) in the same manner as
that for diodes.
• Use a tester with a power source of 3 V or greater to
overcome the circuit resistance.
• If a suitable tester is not available, apply battery posi–
tive voltage and check that the LED lights up.
– General Information
the check point.
Example:
(A) Ignition switch on
(B) Ignition switch and switch 1 (SW 1) on.
(C) Ignition switch, switch 1 (SW 1) and relay on
(switch 2 (SW2) off).
a good ground point or negative (–) battery terminal
and the positive (+) lead to the connector or com–
ponent terminal. This check can be done with a test
bulb instead of a voltmeter.
no voltage between the check points.
the check points.