GM 10486200 Harness,Electronic Ignition Control Module Wiring

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Check spark plug wires when installing new plugs or at recommended intervals. Disconnect each wire from the plug, using a removal tool or twisting and pulling the boot. Look for corrosion inside the boot. Reattach the wire and boot to the plug, ensuring a tight fit. Clean the wire and inspect for damage. Check the wire's flexibility by bending it. Disconnect the wire at the distributor, checking for corrosion and fit. Reinstall the boot or ring onto the distributor. Repeat for all wires. In a dark garage, visually check for arcing or sparks while the engine runs. If needed, buy new wires specific to your engine model and replace each wire one by one to maintain the firing sequence.

After inspecting the spark plug end of the wire, disconnect the wire from the coil. Again, pull only on the rubber boot. Check for corrosion and ensure a tight fit in the same manner as at the spark plug end. Then, reattach the wire at the coil.

Replace the wire at the coil and make sure it's securely fastened. Check the remaining spark plug wires one at a time, ensuring they are securely fastened at the ignition coil and the spark plug. When replacing spark plug wires, purchase a set for your specific engine model, and remove and replace the wires one at a time to avoid mix-ups in the firing order.