How to use Sigmaprobe to detect automotive circuits ?
How to test the automotive circuit? What should be tested for an automotive circuit? This is the question that many novices in automotive maintenance often ask. Let's take a look at what items should be tested to detect automotive circuits.
Automotive Circuits Voltage Test
1) Confirm that the negative pole of the Sigmaprobe tester is grounded.
2) Contact the probe of Sigmaprobe with the test point (plug or terminal).
3) Note the Sigmaprobe voltage reading. The reading should vary within 1 volt compared with the battery voltage under test.
4) If the range of variation exceeds 1 volt, there is a problem with the circuit.
5) The input voltage of the solid-state module can be frequently and quickly checking the continuity of the wire.
If the wire has good continuity, a voltage of 12 volts can be measured at the switch plug.
Operational Diagram
Automotive Circuits Continuity (resistance) Test.
1) disconnect the vehicle battery.
2) Enter the Sigmaprobe resistance mode and connect the Sigmaprobe wire to one end of the circuit part.
3) contact the Sigmaprobe probe to the other end of the circuit.
4) The screen of the Signmaprobe host may show low resistance or no resistance means good continuity.
This test is to check the loss of voltage in the wire or through the connection point and switch.
1) Connect the positive wire (probe) of the Sigmaprobe to one end of the wire close to the battery (or the connection point, the other side of the switch).
2) Connect the negative wire to the other end of the wire (or connection point, the other side of the switch).
3) Turn on the circuit.
4) The Sigmaprobe host screen will show a voltage drop between two points. A voltage difference (or decrease) above 1volt indicates a fault.
Ground wire short circuit detection
Using Sigmaprobe multimeter mode test automotive circuits.
1) Remove the blown fuse and disconnect the battery and load.
2) Contact the probe of Sigmaprobe with the fuse terminal of the load end.
3) Ground the ground wire well.
4) Start from the fuse box, swing the wire left and right, observe the reading displayed on the Sigmaprobe screen, and continue swinging where the wire is suitable (about 6 inches apart).
5) When the Sigmaprobe screen shows a reading, the wire near the place has a short circuit to the ground.
