2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 402Get this manual
ELECTRICAL VOLTAGE DROP TEST
The Voltage Drop Test is used to test for bad connectionsWhen performing the test, you are testing the amount of voltage drop through the connectionA poor or corroded connection will appear as high voltage readingVoltage shown on the meter when testing connections should not exceed .1 Vdc per connection or componentTo perform the test, place the meter on DC volts and place the meter leads across the connection to be testedRefer to the chart on 1.47 to perform voltage drop tests on the starter system