Tech Tips

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Mazda

Mazda RX7-No Start/Discharged Battery

Symptoms: The battery is continually discharged leading to a "No Start" condition.

Probable Cause: 79-85 Mazda RX7's may suffer from a variety of charging and starting problems due to a unique "mid-cable" ground connection. The battery ground cable is grounded at a chassis bolt on the left lower strut tower, before it continues on. If this connection gets corroded, a number of starting and charging problems are likely to occur.

Corrective Action: A voltage drop greater then .2 volts between the (-) negative battery terminal and the engine ground at the (_) negative battery cable, is an indication that the cable should be replaced.

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