Quote:
Originally Posted by BLE 'BURBAN
When doing this, DO NOT START THE VEHICLE!!!
Each code will flash 3 times before moving on to the next code.
First and last code to flash will be code 12 which will be *(pause)** (long pause) *(pause)** (long pause) *(pause)**
a bit of a longer pause will happen before the next trouble code will flash, again 3 times. Once all trouble codes have flashed it will flash code 12 again.
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If it doesn't flash a code 12 then the ECM / PCM does not self check good and you need another one.
I had one where the circuit board broke free of the case and was in limp home mode that wouldn't flash a code 12.
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69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been
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69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc
68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E