(a) Place the voltmeter positive (+) lead against the defogger positive (+ ) terminal.
(b) Place the voltmeter negative (-) lead with the foil strip against the heat wire at the positive ( + ) terminal end and slide it toward the negative (-) terminal end.
(c) The point where the voltmeter deflects from zero to sever al volts is the place where the heat wire is broken. HINT: If the heat wire is not broken, the voltmeter indicates 0 V at the positive (+) end of the heat wire but gradually increases to about 12 V as the meter probe is moved to the other end.
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