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Pelican Technical Article:

Battery Replacement

Jared Fenton

Time:

1 hour1 hr

Tab:

$100

Talent:

**

Tools:

10mm and 13mm sockets, Philips head screwdriver

Applicable Models:

VW Jetta GL (1999-05)
VW Jetta GLS (1999-05)
VW Jetta Wolfsburg (1999)

Parts Required:

Battery

Hot Tip:

Test battery before hand

Performance Gain:

Car starts again

Complementary Modification:

Replace air filter

Batteries wear out. It is a simple fact of life. The battery is perhaps the most important electrical component on the car, and due to its design and nature, is also one of the most troublesome. Often times, a puzzling electrical problem can be solved by doing something as simple as cleaning a battery terminal.

Due to the design of the car, the best way to check battery condition is to use the factory diagnostic computer or a good aftermarket software package. Using a code scanner, you can monitor the battery voltage as well as current draw and alternator output. Chances are that the vehicle likely has diagnostic trouble codes stored indicating an erratic voltage condition.

A few words on safety are required here. Always disconnect the negative terminal first. If you disconnect the positive lead first, there is a chance that your tool may touch the metal chassis. This will result in a short circuit, which could be dangerous to both the car and you.

Be sure to purchase a battery that has the same group number and CCA rating (Cold Cranking Amps). Check the freshness date on the battery that you are purchasing and avoid any batteries that are more than six months old. Note that after you disconnect your battery, the DME computer will lose some of its history memory used for adapting the fuel injection system. As a result, the idle may fluctuate, and the fuel injection mixture may be slightly off as the car relearns its settings.

Loosen and remove the two Phillips head screws (green arrows) and lift the access panel (yellow arrow) up and out of the engine compartment.
Figure 1

Loosen and remove the two Phillips head screws (green arrows) and lift the access panel (yellow arrow) up and out of the engine compartment. This will give you more room to access the battery clamp below.

Shown here is one of the release tabs for the battery cover (green arrow).
Figure 2

Shown here is one of the release tabs for the battery cover (green arrow).

Press the tabs (green arrows) on the sides of the battery cover, and then lift it up and off the battery.
Figure 3

Press the tabs (green arrows) on the sides of the battery cover, and then lift it up and off the battery.

Slide the fuse box (green arrow) back to release it from the fuse box support.
Figure 4

Slide the fuse box (green arrow) back to release it from the fuse box support. Press the tabs (yellow arrows) on the fuse box support to release it from the battery box.

In this picture, you can see the mounting points for the fuse box in better detail (green arrows).
Figure 5

In this picture, you can see the mounting points for the fuse box in better detail (green arrows).

Lift the fuse box support up until you can remove it from the rear pivot points (green arrows).
Figure 6

Lift the fuse box support up until you can remove it from the rear pivot points (green arrows).

Loosen the 10mm nut on the negative terminal (green arrow) until you can pull it off the battery.
Figure 7

Loosen the 10mm nut on the negative terminal (green arrow) until you can pull it off the battery. Then do the same for the positive terminal (yellow arrow). Remember, remove the negative terminal first.

Loosen and remove the 13mm bolt (green arrow) securing the hold down clamp in place.
Figure 8

Loosen and remove the 13mm bolt (green arrow) securing the hold down clamp in place. Remove the clamp and lift the old battery out of the car.

And here's the final result with the battery removed.
Figure 9

And here's the final result with the battery removed. Installing the new battery is the reverse of removal.

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Page last updated: Wed 12/7/2016 02:52:07 AM