Required Test Tool

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Information

To perform this check, a trailer with no faults in the wiring and lights, or a trailer test cable VAS 1537 A is required.
Please note that if a VAS 1537 A trailer test cable is used, only vehicles with a 13-pin plug can be checked.
The test cable can be plugged into the trailer socket to locate faults. The plug has 13 pins; adapters are required for 7-pin sockets. Because of the build-up of heat, ensure that a thermal circuit breaker is used in the test cable.

Fig 1: Identifying Test Cable (VAS 1537 A)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Item	Designation	Source	Explanation
	Socket tester V.A.G. 1537 A