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In a 2003 Ford F-150, the ignition control module is located above the ignition coil in the distribution housing. If your truck is having difficulty starting, this could be a possible cause. Additionally, if the module is failing, your truck may also experience misfiring. A warning sign of a failing ignition control module is the check engine light illuminating on your dashboard, as the ECU can detect system faults. Replacing the ignition control module typically costs around $25 for the parts and approximately $100 for labor at a shop.
The ignition control module (ICM) for a 2003 Ford F-150 is located in a distribution housing above the ignition coil. To access the distributor, you need to remove the distributor cap, rotor, and any dust cover if present.