I have made it to the end of my journey just to be stepped on by who knows what. I put in a new harness made by a company for a 97 5.7L motor from a Silverado. They also re did the programing of the ECM from the very same vehicle to match up with the 96 S10 Blazer. I have power to all my accessories like lights and other features radio and heater for example. I replaced the instrument cluster in the blazer from another S10 that had a tach already in whereas my original did not. Now to the problem there is no power to the Coil module, coil and from what I can tell the fuel tank. Now I know that there are different types of Anti thief systems and I believe I have the Pass Lock system, I only use or have a regular key. I also know that the BCM is specific to the blazer when it was installed with the 4.3 engine.
1. Does the BCM require to be reprogramed? I understand that it controls the accessories and that could be why they appear to be working, except fuel system.
2. Could my lock cylinder be bad since the anti-thief system is based or housed in the lock cylinder.
3. Can that Pass lock system be reprogramed, or do I need to get a whole new ignition lock system?
All in all after all this time I have no juice to start the vehicle. It does crank over but not spark or fuel.
Can anyone help me get over this last hurdle please.