The doorpannel speaker will not work on one but
If you have access to the rear of radio, try reversing the channels, to see if the speaker works, and if it does, then you know the wiring to door speaker is ok, if it doesnt, then you know that the wiring is broken somewhere along the route. If you have access to the cable itself only, try using a AA battery, attach the cables to both ends of the battery, and if it makes a noise, then wiring is ok.
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