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Home >> Porsche >> 2004 >> Cayenne Base >> Repair and Diagnosis >> Maintenance >> Procedures >> Maintenance, Self Diagnostics >> 03 Trailer hitch maintenance: checking operation - as of MY 2004 (Cayenne TIP, Cayenne MAN, Cayenne S TIP, Cayenne S MAN, Cayenne Turbo) >> Checking operation of the trailer hitch socket >> Test procedure

Test procedure

NOTE:
  • The LED for permanent positive -9-  is lit for the entire duration of the test. See Fig 1.
Fig 1: Illustration showing LED for permanent positive on test equipment
GP00014660Courtesy of PORSCHE OF NORTH AMERICA, INC.
Fig 2: Illustration showing the markings and indicators on the test equipment
GP00014660Courtesy of PORSCHE OF NORTH AMERICA, INC.

1. Switch on the ignition and switch through the following loads in turn:

Switch on left -1-  or right direction indicator -4-  : the direction indicator and direction indicator pilot light for the trailer in the instrument cluster light up. Press the relevant key -B-  for left or -C-  right: during flashing, the LEDs -1-  or Fig 2-4-  and the direction indicator in the instrument cluster should not now light up. See Fig 2.

2. Actuate brake pedal - LEDs -6-  should light up. See Fig 2.

3. Switch on parking light - LEDs -5, 7-  should light up. See Fig 2.

4. Switch on parking light and rear fog light. Switch on parking light - LEDs -5, 7-  should light up. See Fig 2.

Disconnect the trailer hitch plug. The rear fog light on the vehicle must light up.

5. Switch off the lights and engage reverse gear.

The back-up light on the vehicle must light up.

General: 

-10-  Charge positiveSee Fig 2.

-11-  Ground for charge positiveSee Fig 2.

-12-  Trailer detectionSee Fig 2.

-13-  Depending on the load (heat build-up) in the test equipment (the more LEDs that are lit up), the tester will switch off and this is indicated by this LED lighting up. Disconnect the test equipment and let it cool for at least 20 minutes. See Fig 2.

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