Operation CHARM: Car repair manuals for everyone.

Battery: Tools and Equipment

Battery electrolyte and coolant tester 998 5011





An optical instrument which measures specific gravity of an electrolyte and freezing point of coolant. The tester compensates for varying temperature.

Multimeter 999 6525:





Measures voltage, amperage and resistance.

Test lamp





A test lamp connected in series to a 12 V battery can be used to test for open and short circuits, arcing.

Test Lamp:





It can also be used to test diodes; the lamp should light in the transit direction only.