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speaker question 900 1994

I test suspect speakers by attaching short lengths of wire to their terminals, then using a AA battery. AA battery voltage is too low to hurt the speaker. Hold the battery with one wire (doesn't matter which) pressed against the battery bottom and scrape the other wire across the battery top. You'll get a scratchy, static-like noise from a speaker if it's not shorted out or open circuit. This does not check whether the speaker can deliver "good" sound - it may be damaged, or just too old to avoid distortion.

I've also used this method to detect which wires up in the dash are connected to which speaker, and that there are no breaks in the wires.
--
Son's XC70, my 83 244DL, 89 745 (Chev LT-1 V8), and XC60. Also '77 MGB and four old motorcycles. Long gone: 1981 244, 1994 940 and 1998 S90.






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New speaker question [900][1994]
posted by  U.S. Diver  on Wed Jul 3 11:34 CST 2019 >

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