How To Test A Battery Charger. Turn on voltmeter unit. Step 1 - Check the Cord.
Place the red lead on the positive battery terminal indicated by a red cover or a symbol. Place the black lead on the negative terminal. Before doing anything more difficult check the charger.
Answer 1 of 6.
Also check for frayed wires. Answer 1 of 6. Plug in your charger to electrical outlet. The first thing to check is the timing mechanism.
