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Pelican Technical Article:

Battery Replacement

Jared Fenton

Time:

1 hour1 hr

Tab:

$120 to $200

Talent:

***

Tools:

10/13mm socket

Applicable Models:

Volvo C30 T5 (2008-13)
Volvo C30 T5 R-Design (2008-13)

Parts Required:

New battery

Hot Tip:

Do a voltage test before replacing battery

Performance Gain:

Better working electrical system

Complementary Modification:

Clean battery terminals.

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.

Begin by opening the hood and locating the battery box on the right side of the engine compartment.
Figure 1

Begin by opening the hood and locating the battery box on the right side of the engine compartment. Remove the battery box cover (green arrow) by pulling up at the tab on the side (yellow arrow) and then off the battery. Note that there are two tabs in the lower battery box (blue arrows) that locate the cover when re-installing.

Now remove the negative terminal from the battery (green arrow).
Figure 2

Now remove the negative terminal from the battery (green arrow).

Loosen the 10mm nut (green arrow) on the negative terminal until you can twist the terminal up and off the battery.
Figure 3

Loosen the 10mm nut (green arrow) on the negative terminal until you can twist the terminal up and off the battery.

Fold the negative terminal and wire (green arrow) up and over the battery, out of the way of the battery terminals.
Figure 4

Fold the negative terminal and wire (green arrow) up and over the battery, out of the way of the battery terminals.

Loosen and remove the two 13mm nuts holding the positive cables to the positive terminal plate (green arrows).
Figure 5

Loosen and remove the two 13mm nuts holding the positive cables to the positive terminal plate (green arrows). Carefully move the positive cables towards the front of the car, out of the way.

Loosen the 10mm nut (green arrow) on the positive terminal until you can twist the terminal up and off the battery.
Figure 6

Loosen the 10mm nut (green arrow) on the positive terminal until you can twist the terminal up and off the battery.

Now carefully pull the front half of the battery box off (green arrow).
Figure 7

Now carefully pull the front half of the battery box off (green arrow). Take note of the plastic hooks at each end (yellow arrows). These need to be oriented correctly when reinstalling.

Loosen and remove the two 10mm nuts (green arrows) securing the clamp (yellow arrow) to the battery box.
Figure 8

Loosen and remove the two 10mm nuts (green arrows) securing the clamp (yellow arrow) to the battery box.

The mounting nut on the right side (green arrow) will require an extension to reach.
Figure 9

The mounting nut on the right side (green arrow) will require an extension to reach. I also recommend having a telescoping magnet on hand to help move the nut out.

Remove the clamp from the battery box.
Figure 10

Remove the clamp from the battery box. You may need to bend it slightly to clear. Remove the battery. Keep in mind it is heavy, so use a battery strap or have a helper assist you if needed.

Take a moment to inspect the bottom of the battery box (green arrow).
Figure 11

Take a moment to inspect the bottom of the battery box (green arrow). If there is a buildup of battery acid at the bottom, use a baking soda/water solution to neutralize the acid. Clean the area up while wearing rubber gloves. Battery acid can burn your skin. Once the battery tray is nice and clean, install the new battery in the reverse order of removal.

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Comments and Suggestions:
Murray Comments: Really super helpful description, made the job very easy thank you.
The Baking Soda is magic on removing the dry acid build up.
If I can add, if your immobilizer does not allow you to start the car after you have replaced the battery, cycle the door lock open then closed 5 times on the key remote and the car will start as per normal.
January 2, 2015
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 

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