Suzuki outboard motors 1988 2003 repair manual., Page 11Get this manual
TOOLS AND EQUIPMENT 2-11 live lead to the positive (t)side of the circuit (to the power source or the nearest power source)Note that the negative voltmeter lead will always be black and that the positive voltmeter will always be some color other than black (usually red)Ohmmeter-the ohmmeter is designed to read resistance (measured in ohms) in circuit or componentMost ohmmeters will have selector switch which permits the measurement of different ranges of resistance (usually the selector switch allows the multiplication of the meter reading by 10,100, 1,000 and 10,000)Some ohmmeters are "auto-ranging" which means the meter itself determine which scale to useSince the meters are powered by an internal battery, the ohmmeter can be used like self-powered test lightWhen the ohmmeter is connected, current from the ohmmeter flows through the circuit or component being testedSince the ohmmeter's internal resistance and voltage are known values, the amount of current flow through the meter depends on the resistance of the circuit or component being testedThe ohmmeter can also be used to perform continuity test for suspected open circuitsIn using the meter for making continuity checks, do not be concerned with the actual resistance readingsZero resistance, or any ohm reading, indicates continuity in the circuitInfinite resistance indicates an opening in the circuitA high resistance reading where there should be none indicates problem in the circuitChecks for short circuits are made in the same manner as checks for open circuits, except that the circuit must be isolated from both power and normal groundInfinite resistance indicates no continuity, while zero resistance indicates dead shortFig32 The Battery TendeP is more than just battery charger, when left connected, it keeps your battery fully charged
Digital VoltIOhm Meter (DVOM)
ISee Figure 33
Multimeters are an extremely useful tool for troubleshooting electrical problemsThey can be purchased in either analog or digital form and have price range to suit any budgetA multimeter is voltmeter, ammeter and ohmmeter (along with other features) combined into one instrumentIt is often used when testing solid state circuits because of its high input impedance (usually 10 megaohms or more)A brief description of the multimeter main test functions follows: Voltmeter-the voltmeter is used to measure voltage at any point in circuit, or to measure the voltage drop across any part of circuitVoltmeters usually have various scales and selector switch to allow the reading of different voltage rangesThe voltmeter has positive and negative leadTo avoid damage to the meter, always connect the negative lead to the negative (-) side of the circuit (to ground or nearest the ground side of the circuit) and connect the posi-