G 20 Van V8-379 6.2L DSL VIN C FI (1992)
terminal "A10" should turn lamp "OFF".
4. This step checks for open CKT 451 from ECM to diagnostic terminal in ALDL connector. The lamp should flash Code 12, when terminal
"A6" is grounded.
5. Checks for proper voltage supply to ECM. Both should read over 9 volts. Terminal "C14" is ignition, and terminal "C16" is constant battery
for long term memory.
6. Checks for a bad ground to ECM, terminal "C2" is connected in the ECM.
7. This step distinguishes between a faulty ECM and PROM. Normal response is for code 51 to flash, even though the PROM is not installed in
the ECM. If it doesn't, it means that the ECM is faulty.
