Test purpose:
This test is designed to help you determine if the power feed cable to the alternator has any voltage drop on it in a loaded environment. By testing for voltage drop with load on the cable (such as with high draw loads) this test allows us to look at the amount of drop on the feed over a given period of time with draw on it. Any voltage drop above 500mV on the power feeds or battery cables can cause problems down the electrical “chain of custody” and can possibly cause electrical gremlins to plague the rest of the systems on board.
Tool Setup:
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Test Procedures:
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Top Chanel: N/A
Bottom Channel: Voltage DC ranged at 60V Set Min/Max to Max
Speed: 64MS (256) or (4000 Hz 256 SMPL)
Place Leads on tool to Voltage DC
Use Probe Tips on leads or clamps
Press or clamp the ground probe on Battery positive Terminal.
Press or clamp the positive probe on the Alternator output terminal.
Clear Min/Max and set to Max
Turn over the engine and turn on as many loads as possible (headlamps, radio, Air conditioner, etc...)
Rev the engine to 2,000 rpm and hold until battery volt drops and the alternator kicks over.
During the alternator kick over monitor the data intelligence menu