The only code is for fuel level sensor and thats been on for almost 2 years. the problem before was i had no radio, horn, alarm,security light, dome lights, power windows and locks would only work if key was in the "on" position and no start. running out of ideas i was curious if the horn itself worked so i unplugged it and touched a wire from the pos battery terminal to the horn, it honked and i noticed the security light was flashing again. checked everything again and all works except dome light.