Your truck does not have a pick up coil. It has a hall effect switch in the distributor. Are you referring to the TFI module on the driver's side of the engine compartment/ inner fender. The Thick Film Integrated Ignition Modules TFI's were notorious for overheating and failing when they were mounted on the distributor body. Ford relocated them to the inner fender in a finned aluminum heat-sink to keep them cooler and last longer. Usually the cause of failure is an ignition coil that is shorting-out or drawing too much current. This will cause premature or repeat failure of the ignition module (TFI) and is often missed by most technicians because replacing the module gets the vehicle going again, for a while, as you know.
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