QuestionI just replaced my plugs, wire, cap & rotor on my '99 suburban. I cursed GM for the location of the distributor! Once finished, will not fire. I rechecked wires.....I get no spark out of my coil wire (against ground. Its seems odd the coil would go, when it was working fine before. How do you properly test a coil?
AnswerDisconnect the distributor lead and wiring from the coil.
Set the ohmmeter to the HIGH scale, then connect it to the coil as shown in Step 1 of the illustration. The reading should be infinite. If not, verify a proper test connection to be assured of a true test result and if still not infinite, replace the coil.
Set the ohmmeter to the LOW scale, then connect it as shown in Step 2 of the illustration. The reading should be very low or zero. If not, verify a proper test connection and replace the coil.
Set the ohmmeter on the HIGH scale, then connect it to the coil as shown in Step 3 of the illustration. The ohmmeter should NOT read infinite. If it does, verify the connection and replace the coil.
Reconnect the distributor lead and wiring to the coil.
Sorry I could not send an image through this web site. You can go to www.autozone.com and click on vehicle repair info to get this full page.
