Disconnect the cable from the negative terminal of the battery. Unplug the coil high tension wire and both electrical leads from the coil. Remove both mounting nuts and remove the coil from the engine. Check the coil for opens and grounds by performing the following three tests with an ohmmeter. These three resistance checks will determine whether your separately mounted coil is good or bad. Using the ohmmeter's high scale, hook up the ohmmeter leads as shown. The ohmmeter should indicate a very high, or infinite, resistance value. If it doesn't, replace the coil. Using the low scale, hook up the leads as shown. The ohmmeter should indicate a very low, or zero resistance value. If it doesn't, replace the coil. Using the high scale, hook up the leads. The ohmmeter should not indicate an infinite resistance. If it does, replace the coil. Installation of the new or old coil is the reverse of the removal procedure. Remove the distributor. Turn the four latches and remove the cap and coil assembly from the lower housing. Connect an ohmmeter to both terminals of the cap coil assembly. The reading should be zero, or nearly zero. If it isn't, replace the coil. Connect the ohmmeter between each of the terminals of the coil assembly and the center contact of the cap. Use the high scale on the ohmmeter. Replace the coil only if both readings are infinite. Remove the coil cover attaching screws and lift off the cover. Remove the ignition coil mounting screws and lift the coil; with the leads, from the cap. Remove the ignition coil arc seal. Clean with a soft cloth and inspect the cap for defects. Replace if necessary. Assemble the new coil and cover in the cap. Install the distributor cap. Install the distributor in the engine.