The following electrical wiring diagram schematics harness and circuit system apply for the 2008 Jeep Wrangler JK. description and illustration of the electrical system schematics and diagram of the JK which covers starter and related parts system, generator and alternator, module and engine controllers, engine compartment modules, instrument panel modules, brakes/suspension and steering modules, power distribution center, fuse block, junction block and relay, sensors, switches, horn, battery.