Indicator Light & Warning Light Operation
- Verify that Green indicator light and Amber warning light illuminate when ignition is turned on. If not, check 7.5A "GAUGE", "CHG" and "IGN" fuses. If fuses are blown, check for short and repair as necessary. If the fuses are okay, check to see if discharge warning light is out. If it is okay, the charging system is faulty. If the light is out, the combination meter is faulty.
- If Green indicator and Amber warning lights illuminate when ignition is turned on, check to see if indicator and warning lights are out during engine idle. If both lights and discharge warning light are on, the charging system is faulty. If both lights stay on and discharge warning light is off, go to step 4).
- If Green light stays on, check for open circuit in wire harness between low pressure switch and combination meter. If circuit is okay, replace faulty low pressure switch. If Amber light comes on, check for open circuit in wire harness between high pressure switch and combination meter and check for ground connection of switch. Repair either circuit as necessary.
- If both indicator and warning lights are out during engine idle, check to see if Green indicator light comes on when 2 psi (.14 kg/cm2 )) pressure is applied to both pressure switches. If Green indicator does not come on, check for short circuit in wiring harness between low pressure switch and combination meter. If circuit is okay, replace faulty low pressure switch.
- If Amber light comes on, see if Green indicator light comes on when 11.9 psi (.84 kg/cm2 ) pressure is applied to both switches. If not, replace faulty high pressure switch. If it does come on, combination meter is faulty.
- If the Green indicator light does come on when the pressure in step 4) is applied, check to see if Amber indicator light comes on when 11.9 psi (.84 kg/cm2 ) is applied to both switches.
- If not, check for short circuit in wire harness between high pressure switch and combination meter. If no short circuit is present, replace faulty high pressure switch. If Amber light does light when pressure is applied, turbocharger indicator and warning light operation are okay.