The wiring diagram is one of the section available in the 2004 Jeep Wrangler TJ Service Manual. The wiring diagrams are designed to provide information regarding the vehicle wiring content. In order to effectively use the wiring diagrams to diagnose and repair the Jeep, it is important to understand all of their features and characteristics.

Diagrams are arranged such that the power (B+) side of the circuit is placed near the top of the page, and the ground (B-) side of the circuit is placed near the bottom of the page.

All switches, components, and modules are shown in the at rest position with the doors closed and the key removed from the ignition.

The wiring diagram section has its own contents, which are : How to use the wiring diagrams; circuit information; circuit functions; section identification and information; connector, ground and splice information; General warnings; Wiring harness diagnosis and testing; ESD sensitive devices standard procedure, testing of potential standard procedure, testing for continuity standard procedures, testing for a short to ground, testing for a short to ground on fuses powering several loads, testing for a voltage drop; Wiring/terminal special tools; connector removal and installation; diode removal and installation; terminal removal and installation; wire splicing standard procedure.

Wiring diagram system of 2004 Jeep Wrangler TJ discussed including the power distribution, fuse block, ground distribution, bus communications, charging system, starting system, fuel/ignition system, transmission control system, vehicle speed control, antilock brakes, vehicle theft security system, instrument cluster, horn/cigar lighter/power outlet, air conditioning-heater, airbag system, interior lighting, audio system, rear window defogger, front lighting, rear lighting, turn signals, wipers, splice information, connector pin-outs, connector/ground/splice location, power distribution.

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