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Originally Posted by JaySVX
Multi-meter would work. My guess would be he suggested a bulb because people typically have 12v bulbs available more so than a multi-meter. Just attach the two ends to the bulb and turn the radio on, as so the antenna motor would get power.
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A multi meter will work but a bulb is a better option. A high impedance meter draws only a minute current and will not show up resistance in the circuit. However a bulb or test lamp as a result of any resistance, will not illuminate to full brilliance and will therefore show up a fault.
Yes, simply connect the two bulb contacts to ground and the circuit to be tested for voltage/current, i.e. in this case with the radio switched on.
Go ahead and experiment with your multimeter, you will learn a great deal.
