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Home >> BMW >> 1981 >> 633CSi Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> BOSCH Electronic Ignition System >> Testing >> Rotor Resistance Check

Rotor Resistance Check

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Set an ohmmeter to the x1000 scale. With ignition switch off and distributor cap removed, attach ohmmeter leads to rotor. Resistance should be 1000 ohms for Mercedes-Benz or approximately 5000 ohms for all other models.