Tried another PCM today out of another early 04 auto 4x4 like mine today. Mine has build date of 11/03 PCM I tried had truck build date of 9/03 truck would only crank not start.
LOLTried another PCM today out of another early 04 auto 4x4 like mine today. Mine has build date of 11/03 PCM I tried had truck build date of 9/03 truck would only crank not start.
PCM or ECM?
ECM is on the side of the engine.
Tried another PCM today out of another early 04 auto 4x4 like mine today. Mine has build date of 11/03 PCM I tried had truck build date of 9/03 truck would only crank not start.
Wrong. I put an 03 ecm on my 04 and it started right up. The gauges didn't work until I flashed it, but the engine ran fine.The ECM keeps the engine from starting unless the vin is matched. We replace them and everytime the vin needs reset with a DRBIII.
Wrong. I put an 03 ecm on my 04 and it started right up. The gauges didn't work until I flashed it, but the engine ran fine.
Apparently your truck does not have a security system or its disabled. With a security system the vin in the ecm must match the vehicle to allow the engine to run.
off topic but how do you go about disabling security?
Stick a screwdriver in it. ? :lolly:
If you are still having the problem mine did the same somewhat but no codes. Clean all your battery terminals (I know you said you did) and change out the clamping bolts for the ends. The wire that runs from pass batt to driver batt mounts to a stud and can cause the driverside to not charge properly. The ecm reads voltage to tell the alternator to charge from a battery temp sensor located under the driverside battery. This was the problem with mine. Put a new one in and all is now good for charging.
Dumb question. I always thought a good charging voltage was 13.2-14.5. I put the multimeter on my batteries and got 15.00v on passenger side and 15.02 on the drivers side. Isn't that too high?