Lighting - Backup Lights Come ON When Shifting M/T

Carrera GT

3/04 9472

Section - 9, Electrical

Date: 12-10-04

Backup Lights Come on Temporarily When Shifting

Vehicle Type:
Carrera GT (980)

Model Year:
2004 (4) and 05 (5)

Concerns:
Backup light come on temporarily when shifting gears from 1 > 2 and from 3 > 2.

Information:
When shifting into second gear (1 > 2 or 3 > 2) the backup light switch can be activated temporarily causing backup lights to come on. The cause are tolerances between the transmission shifting shaft and the backup light switch. An additional sealing ring has been placed on the backup light switch as needed in vehicles produced as of the date of introduction given below.

Whenever there is a customer complaint on vehicles produced before the introduction date listed below, the existing sealing ring needs to be removed from the backup light switch and then reinstalled with two new sealing rings.

Introduction:

August 5, 2004 as of the following VIN:

98X4L 00 1143 USA





Parts Information:

Tools:
Open ended wrench a/f 19 or Crows foot wrench a/f 19
Extension
Torque wrench 4 - 20 Nm (3 - 15 ftlb.)

Work Procedure:

Install two new sealing rings on the backup light switch.

1. Open engine compartment lid.





Note:
The backup light switch (Figure 1, arrow) is screwed into the transmission housing and is located next to the transmission oil filler plug.

Caution!
Damage due to scratching of the body accessories and the vehicle paint finish.

> Cover the rear end of the vehicle with a suitable vehicle protective cover while working.





2. Press in the lock on the plug connection for the backup light switch (Figure 2, arrow) and pull off connector upwards from the switch at the same time.

3. Unscrew the backup light switch with sealing ring from the transmission housing.

4. Remove and dispose of the sealing ring from the backup light switch.

5. Push two new sealing rings (part number, 900.123.101.30) onto the threads of the backup light switch. Screw in the switch into the transmission housing and tighten.

Tightening torque: 18 Nm (13 ft lb.).

6. Attach connector to the switch.

7. Have a second person help check the operation of the backup light switch.

7.1 Switch on ignition.

7.2 Depress clutch completely.

7.3 Shift into reverse gear and check if the backup lights come up.

7.4 Shift into first gear and check if the backup light goes out.

7.5 Shift through the following gears on the transmission: 1 > 2, 2 > 3 and 3 > 2. The backup light must no longer come on while doing this.

8. Remove vehicle protective cover.

9. Close the engine compartment lid.





Working Time:





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