Ignition System - HEI/Est/ESC

• Description
  • High Energy Ignition (HEI)
  • HEI With Electronic Spark Timing (Est)
  • HEI-Est With Electronic Spark Control (ESC)
  • HEI With Electronic Spark Control (ESC)
  • Integral Ignition Coil
  • Remote Ignition Coil
• Operation
  • HEI-Est (Except "S" & "T" Truck W/2.5L)
    • Notes
    • Terminal "A" - REF LOW
    • Terminal "B" - BYPASS
    • Terminal "C" - REF
    • Terminal "D" - EST
  • HEI-Est (Only "S" & "T" Truck W/2.5L)
    • Notes
    • Terminal "A" - EST
    • Terminal "B" - REF
    • Terminal "C" - BYPASS
    • Terminal "D" - REF LOW
  • HEI-ESC System
  • HEI-Est-ESC System
• Diagnosis
  • All HEI/HEI-Est (Except "S" & "T" Truck W/2.5L)
  • HEI/Est On "S" & "T" Truck W/2.5L Only
  • HEI-ESC
  • HEI-Est-ESC
• Component Testing
  • Electronic Module (HEI)
  • Ignition Coil (HEI)
  • Pick-Up Coil (HEI)
  • Capacitor (HEI)
  • External Coil Resistance Check (HEI-Est)
    • External Mounted Coil (Sealed Module Connector Distributor)
  • Integral Coil Resistance Check (HEI-Est)
    • Integrally Mounted Ignition Coil
  • Pick-Up Coil Short & Resistance Checks (HEI-Est)
  • "S" & "T" Truck W/2.5L Only (HEI-Est)
    • Hall Effect Switch
• Overhaul
• Wiring Diagrams