LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Triumph >> 1981 >> TR8 Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> LUCAS "Opus" Electronic Ignition System >> Testing (All Models Except XJ6) >> Drive Resistor Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Drive Resistor Check

  1. A drive resistor is used on some models, such as the TR7, and is mounted externally near the distributor control module (amplifier). This is due to its size and heat dissipating requirements.
  2. To check, disconnect connectors from resistor. With ignition switch "OFF", attach ohmmeter leads to each resistor terminal. Resistance should be 9.5-11.5 ohms. If not, replace drive resistor.
scientia non olet · About LEMON Manuals