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
The sum of all voltage drops in a circuit equals the source voltage. A voltage drop that
exceeds normal limits indicates excessive resistance (an unwanted load) in that portion of
the circuit.
A voltage drop test can quickly isolate excessive resistance in a circuit that ma
y not be
detected using a resistance test. The Ohmmeter only passes a small current through the
portion of the circuit you are testing. A voltage drop test is done with circuit operating at
normal current levels. A loose pin in a connector or a damaged wir
e may show continuity
with the Ohmmeter but under load show a voltage drop due to the increased resistance
during normal current levels.
Converting Voltage
Values:
To convert volts to
millivolts (and vice versa)
just move the decimal
point three places.
Converting Voltage Values
−
Automotive voltage values vary from around 14 volts to very
small values under 50 mV.
CAUTION:
Hybrid vehicles such as the Mahindra REVA use circuits with high voltage and
current (over 200 volts). Follow all safety precautions and service
procedures when working on high voltage circuits.
Values under 1 volt are often expressed as millivolts. 1 volt is equal to 1,000 millivolts.
Convert the values as follows:
•
Volts to millivolts, move the decimal point 3 places to the right.
(example: 1.34 V = 1,340 mV)
•
millivolts to volts, move the decimal point 3 places to the left.
(example: 289 mV = .289 V)
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