Ignition Wires: Installation
- Whenever an ignition wire is removed for any reason from a spark plug or ignition coil, or a new ignition wire is installed, Silicone Dielectric Compound D7AZ-19A331-A, Motorcraft WA-10 or equivalent meeting Ford specification ESE-M1C171-A must be applied to the ignition wire boot prior to installation. Using a small, clean tool, coat the entire interior surface of the boot with Silicone Dielectric Compound D7AZ-19A331-A, Motorcraft WA-10 or equivalent meeting Ford specification ESE-M1C171-A.
- Install each ignition wire to the proper terminal on the ignition coil. The terminals on the ignition coil and the ignition wire are numbered. Make sure the boots are fully seated and that both ignition coil boot locking tabs are engaged.
- Route the ignition wires.
- Connect the spark plugs to the ignition wires.
CAUTION:
Proper installation of ignition wires is critical to vehicle operation. If one ignition wire is not properly installed on spark plug or ignition coil, both spark plugs connected to that segment of the ignition coil may not fire under load.