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Q: no spark on 1991 Acura Integra

No battery voltage to distributer, no voltage on the BLK/YEL wire coming to the dist. Where does this wire get the voltage? In the recent past I have replaced the coil TWICE, the hi-tension out put conection was cracked and burned, mabe moisture getting into the cap? Need you expertise.
Thanks, Jim
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The black yellow wire gets power directly from the ignition switch. The electrical portion of the ignition switch is a relatively high failure item.
The White/Black wire at the ignition switch is battery live if it has no power the 50 or 70 amp main fuse has blown.
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