Firebird V8-305 5.0L (1982)
ground or faulty lamp driver.
A normal reading is about 9 to 11 volts because of the drop through the upper resistor in the lamp driver. Over 11 volts indicates there is no drop
in the lamp driver. This indicates a bad ground or faulty lamp driver.
4. This step checks for an open in the wire to terminal "B".
Normal voltage is approximately battery voltage.
4a. This checks for an open wire to terminal "E" from the "CHECK ENGINE" lamp.
With terminal "E" grounded, the lamp should normally light. Lamp "OFF" indicates an open, and lamp "ON" indicates faulty lamp driver
connection or lamp driver.
5. This checks for a grounded wire from driver terminal "C" to ECM terminal "G". Normal response is light "ON".
