- A handy device for checking the condition of your car battery & alternator charging voltage
- Simply connect the tester to a suitable ground point & place the test probe on the positive terminal of the battery while the engine is switched off
- LEDs light up to show the current state of the battery from one
- the battery is discharged to three
- a good battery condition With the engine running at about 2000 rpm connect the test probe to the output of the alternator. Indicators now illuminate to show the state of the alternator. As with the battery condition combinations of LEDs indicate whether the alternator voltage is low normal or too high. Ideal for fast & simple diagnostics. Supplied with full operating instructions.