260 Series Tractor Service Manual 6 - 19
ELECTRICAL SYSTEMS
*Note: If the multimeter does not have a diode test feature, this test can not be performed. This is not a problem if
powered tests are done. Powered tests must be performed to test relays (see table below).
*** Same as battery voltage
Note: A 12 volt battery is needed for this test. USE CAUTION WHEN MEASURING RESISTANCE WITH A
POWERED CIRCUIT. CONTACTING A VOLTAGE SOURCE WITH A METER IN OHMS POSITION CAN
SERIOUSLY DAMAGE THE METER.
Testing - No Power To Circuit (With Module Out of Circuit)
Meter Scale Meter Probe Negative Meter Probe Positive Meter Reading
Ohms Pin 3 Pin 5 Open (More than 100K ohms)
Diode* Pin 3 Pin 6 .5 to 1 Volt
Diode* Pin 3 Pin 1 .5 to 1 Volt
Diode* Pin 3 Pin 4 .5 to 1 Volt
Ohms Pin 1 Pin 4 350 to 400 ohms
Ohms Pin 2 Pin 4 Open (more the 100K ohms)
Testing - Powered Circuit (With Module Out of Circuit)
Volt Meter Battery
Meter Scale Neg Probe Pos Probe Neg Lead Pos Lead Meter Reading
Ohms Pin 2 Pin 5 Pin 3 Pin 6 < 10 Ohms
Volts (Caution) Pin 1 Pin 2 Pin 1 Pin 4 12 Volts***
Volts (Caution) Pin 3 Pin 2 Pin 3 Pin 4 12 Volts***
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