Measure the resistance between terminals No. 1 and No. 2. There should be about 4.0 ?.
2.
If the resistance is not as specified, replace the door speaker (A).
Tweeter
1.
Tweeter - Test
1.
Measure the resistance between terminal No. 1 and the outside terminal of the capacitor (A). There should be about 4.0 ?. Also check the capacitor condition.
2.
If the resistance is not as specified, replace the tweeter.
Subwoofer
1.
Subwoofer - Test
1.
Measure the resistance between the terminals No. 1 and No. 2. There should be about 2 ?.
2.
If the resistance is not as specified, replace the subwoofer.