C 10 1/2 Ton Pickup 2WD V8-305 5.0L VIN F 4-bbl (1983)
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Engine Control Module: Description and Operation
"E" Cell
The ``E'' cell controls voltage at ECM terminal 15. For the first 25,000 miles of vehicle operation, voltage is nearly zero. The ``E'' cell then causes
voltage to rise to approximately 5 volts. This provides a different control value for some systems.