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FWIW, from the MY 2019 and on, the main fuse box for your accessory power in the Cayenne is under the plastic dead pedal. Middle column on the bottom is "Row D", particularly the bottom two vertical slots with identical 20A fuses (No. 15 & 16) control right and left headlight electronics for PDLS features that are only available with the ignition ON. You may piggy back off of them with an ATO sized add-a-fuse to gain 12V ACC power. There IS enough space for two adapters, but the grounding tail of the adapters may interfere with each other when installed side-by-side. Unfortunately, there is a plastic divider that will interfere if you flip-flop the adapters. Minor plastic shaving of the pigtail is necessary.


Beware, the NEWW Cayenne uses a LiFePO4 (Lithium) battery that is sending 48V to onboard equipment. DO NOT splice into an existing power cable until you've taken a meter to it.

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