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Installation of a Jetta Stereo Power Wire

The Jetta has been manufactured by Volkswagen since 1979. Since its introduction, Volkswagen has equipped the Jetta with a stereo system. The Jetta stereo requires a switched power source and a constant power source to function properly. A switched power source is off when the vehicle is off, which prevents the stereo from draining the battery. A constant power source provides continuous power to the stereo, enabling it to retain station presets and the time.

Instructions

Constant Power

1

Open the hood. Disconnect the black negative wire connected to the battery, using a small crescent wrench.

2

Slide the factory radio from the dash of the Jetta, exposing the wires. This procedure will vary by model year. Consult the owners manual for specific directions.

3

Connect a power wire with in-line fuse to the positive terminal on the Jettas battery, using a small crescent wrench. The in-line fuse should be as close to the battery as possible.

4

Route the power wire from the battery through an existing hole in the rear wall of the engine compartment that separates the engine from the seating area. You may need to drill a hole to do this.

5

Route the power wire through the Jettas dashboard to the rear of the radio and trim the excess length with wire cutters.

6

Locate the yellow constant-power wire coming from the back of the factory stereo.

7

Remove the plastic wire coating from the ends of both the yellow wire from the radio and the power wire with in-line fuse. Connect them by twisting the bare wire ends together and wrapping with electrical tape.

Switched power

8

Locate the red switched-power wire coming from the back of the factory stereo.

9

Remove the plastic wire coating from the ends of the switched power wire and a 5-foot section of stereo wire. Twist the bare ends of both wires together and wrap in electrical tape.

10

Route the stereo wire through the Jettas dashboard to the fuse box.

11

Remove the radio fuse from the fuse box by erring to the diagram in the owners manual.

12

Remove the plastic coating from the end of the stereo wire that is closest to the fuse box and attach the bare wire to a fuse tap.

13

Reinsert the radio fuse and the fuse tap together in the fuse box.

14

Reinstall the radio and connect the negative battery cable. Close the hood.