Ignition System Wiring Diagram (1997-1999 4 Ford F150 Jun 25, 2019Ignition System Wiring Diagram. 1997, 1998, 1999 4 Ford F150, F250. Coil Pack, Crankshaft Position (CKP) Sensor, Camshaft Position (CMP) Sensor Circuit Diagram. 1999 Ford F150: replaced enginet came module Apr 19, 2012I have a 1999 Ford F-150, replaced engine and everything was working find. The check ingine light came on after a few months, I had the code checked and it showed oxygen sensor left bank and EGR sensor. I replaced the EGR module and was getting ready to replace oxygen sensor and noticed the connecting wiring had come apart.