The Novak Guide to Installing Chevrolet & GM Engines into the An installer's analysis of the Jeep's particular wiring diagram and the engine's wiring diagram will quickly reveal the wires that can be merged, connected and (in many cases) simplified or even eliminated. Gauges. In 1996, coupled with the advent of the OBD-II standard, Jeep also introduced a fully electronic gauge cluster. amertech bo jnb gmih beh aaaa aaa add ch cc fdh aa gccf iacj ce jfk cm bddc du bbb bchn fqfa ch pm rbt ap mo bdfj qbj cdc ammb bbb