How to Check an Ignition Coil on an Aircooled Volkswagen MethodWarnings Be sure to have a fire extinguisher nearby! !Use extreme caution.Pull the wire out of the center of the distributor with a rubber handled pair of pliers, and hold it about 1/4" from the metal clips that holds the distributor cap on.Have someone crank over the engine. There should be a nice blue spark that goes from the end of tSee all 5 steps on wwwhow Use extreme caution and be sure to have a fire extinguisher nearby!Safety should always be your #1 focus when working on a vehicle. Absolutely nothing in this world is so important, that you should ever practice unsafe maintenance on your vehicles. Always use the proper tools for the job at hand. Common sense is a very important in following any directions for maintenance.See all 2 warnings on wwwhow86%(44) Coil Wiring Hook-Up's - Itinerant Air-Cooled Jul 30, 2017Look at the top of the coil closely by the 2 small terminals there will be plus and minus signs. The plus sign is where the hot wires go. Go turn on the ignition switch, with a volt meter find the wire with power, it goes to the plus side of the coil. The negative side of the coil goes to the distributor.