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alternator trouble/testing ?

2K views 18 replies 8 participants last post by  GTJIM (R.I.P.) 
Alternator Tester

Found this neat wee device recently for testing alternators and batteries while in the car. Just a set of probes attached to a box with LEDs on it - the lower three lights are for a battery test with the motor off and the upper three for the alternator while the motor is running. The lights just indicate voltage in the circuit being tested - one light on is low voltage = poor
all lights on is "Strong Output". A cheap easy way to reassure oneself.
No makers name is visible but it came from an auto supply shop.
 

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