LEMON Manuals: Even more car manuals for everyone
Home >> Pontiac >> 2008 >> Grand Prix Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays & Gages >> Diagnostic Information and Procedures >> Head Up Display (HUD) Image Adjustment Inoperative >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the head-up display (HUD) switch.
  2. Test for less than 1.0 ohm of resistance between the low reference circuit terminal 3 and ground.
    • If greater than the specified value, test the low reference circuit for an open/high resistance.
  3. Ignition ON, test for 4.8-5.2 volts between the HUD image up control circuit terminal 7 or the HUD image down control circuit terminal 4 and the low reference circuit terminal 3.
    • If greater than the specified range, test the control circuit for a short to voltage resistance. If the circuit(s) tests normal, replace the HUD.
  4. If all circuits test normal, test or replace the HUD switch.
scientia non olet · About LEMON Manuals