96SilverLT1

if I remember right the code 12 comes from an interuption of battery power to the module. Did you have the battery drained at any point to where it would have had low voltage?

94droptop

i think that my brother in law who helped me put a new engine in forgot to hook up the high voltage power or something like that? i went to a mechanic when i had a check engine light on and he noticed it was not hooked in a plugged it in, then the air bag light came on he said it could have happen through a voltage spike or something like that how do i fix it?

96SilverLT1

unhook both battery cables and touch the cables together. This will drain the PCM and related modules and clear all codes from memory. Then hook it all back up and see what happens (note, the car might run funny for a little bit untill the adaptives are relearned)

94droptop

that worries me that wont short out anything. have you done this before. i am not denying you know your stuff i am just making sure, i just had to pay 2000 for a new engine i dont wnat to have to worry about electrical

96SilverLT1

as long as the battery is totaly dissconected then it's fine. It's actualy the only way to clear some emissions codes without a scanner. What your doing is alowing the small amount of "KAM" (Keep alive memory) for the computer to spread through the ground disipating it. If your really really nervous about it you can unhook the batery and press the brake pedal. It does basicly the same thing but doesn't always work.

94droptop

so i disconnect the main cables from the battery( the wires with the terminals on them) and touch them together, do i have to diconnect all the small ground wires attached to the cable

94droptop

still is on? didnt work? any one in here work for ford