Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › need help testing coil pack for spark 01 ford f150 › Reply To: need help testing coil pack for spark 01 ford f150 March 5, 2021 at 5:05 pm #989246 BillyParticipant All plugs should be connected. Sounds like the person in the YouTube video made a homemade spark tester. Spark testers are like $5 at the auto parts store or Harbor Freight.