Genuine Buick Century Ignition Coil

Buick Century Ignition Coil Parts Questions & Answers

• Ignition Coil Assembly
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  Q: How to test and remove/install the Ignition Coil on Buick Century and Regal?

  A: To test the Coil-In-Cap, start by removing the distributor cap and disconnecting the coil. Use an ohmmeter to check the resistance across the primary connections, ensuring it is close to zero. Then, test the resistance between the primary ground and the coil secondary connector, using both solid wire and dotted line connections. If the readings are infinite, the coil needs to be replaced. For a separately mounted coil, disconnect the secondary lead and unplug the primary leads. Remove the coil from the engine and use an ohmmeter to check the resistance on the high scale. It should be nearly infinite. Then, test the resistance on the low scale, which should be close to zero. Finally, reset the ohmmeter to the high resistance scale and check for continuity. If all three tests pass, the coil is satisfactory. To remove and install the coil-in-cap, mark the high tension wires and disconnect them from the distributor cap. Remove the cap by depressing and rotating the wire type latch. Turn the cap upside down and remove the four bolts holding the coil. Disconnect the primary wiring and remove the coil. Clean the mounting area and inspect the cap for defects before installing a new coil. For a separate cap, disconnect the negative battery cable and remove the secondary coil lead. Disconnect the harness from the coil assembly and remove the mounting screws. Install the new coil, reconnect the harness, and reattach the secondary lead. Finally, reconnect the negative battery cable.