Checking Plugs & Wires

Crank engine. Using a high-output spark tester, check for spark at both spark plug wires of each coil. If no spark at all coils, go to CHECK FOR VBAT TO EDIS MODULE. If spark is missing from both spark plug wires of one or 2 coils, go to CHECK VBAT OPEN TO COIL. If spark is missing from one wire, replace spark plug wire and spark plug. Recheck ignition system.