The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The methods may be modified as a result of changes introduced by the manufacturer in the production of the various component
units and accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present document,are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any
person other than the trained personnel, at the Authorized Service Centre of Mahindra & Mahindra Ltd.,will amount to unauthorized use and shall be liable for penalty/prosecution
© 2013 Mahindra & Mahindra Ltd.
MAN-00233
MAY 2013/Rev 1
WIRING MANUAL
25042013
ESSENTIAL ELECTRICAL CONCEPTS
DIODE:
A diode is like an electronic valve. It allows current to flow in one direction but not in the
other.
•
The diode conducts current in a circuit when a small voltage is applied in the correct
polarity (direction).
Diode Check:
To check a diode, use the Diode Check function on the meter and apply both forward and
reverse bias.
Use the diode check function to test a diode with the following steps:
1. Set the DMM mode selector to diode check.
2. Connect the red lead to the anode (the end away from the stripe on the diode).
3. Connect the black test lead to the cathode (end closest to the stripe).
4. Read the DMM display.
−
Forward bias voltage for most diodes in automotive applications is about 0.5
and 0.8 volts.
5. Reverse the test leads to test the diode in reverse bias.
6. The DMM display should show O.L for over
−
limit."
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