OTC Tools OTC 3589 DIS Quick Test Kit. Comes with zinc-plated brass adapters to fit all auto coils, test probes and leads, spark gap tester, and instruction manual that leads technician through the power balance test. Does power balance in less than 5 minutes on standard, electronic, or distributorless ignition systems. Exclusive spark gap tester measures KV voltage on any ignition system, providing instant diagnosis of problems whether a faulty coil, ignition wire, or spark plug. Ideal for checking spark in no-start condition. Chart leads technician through tests to check if ignition is bad ground all the way to defective coils. Special short adapters included for hard-to-reach coils on transverse mounted engines.