12v power source in boot of 2014 C4 hatch

[snake14]

I recently acquired a 2014 C4 Seduction (hatch). I'm trying to locate a clean 12v power supply that I can tap into in the boot. I tried the reverse lamp and the BSI complains after a few minutes with the car running. I found an unused harness below where higher trim models have a 12v accessory socket but none of the 6 pins seem to be live. Any insights or recommendations would be appreciated.

[mickthemaverick]

It may be that as you do not have the kit those wires were for, there may be an empty fuse position. Check in your handbook for fuses and maybe identify a spare one.

[snake14]

Yeah. The manual says F14 is for the rear 12v accessory socket and the fuse is in position. There is a black MDC harness taped up out of the way near the glove compartment fuse box. Anyone know if that supplies the harness in the boot? I don't see anywhere on the fuse box for it to connect. Does at least one of those conductors go to the back harness if I were to power it? Is there a better 12v source that I can tap into in the boot that won't trip up the BSI?

[snake14]

If it helps, here's a picture of the harness that I found in the boot below where some models have the optional equipment:

Wiring harness in back left boot

[PaulC5]

It could be for a towbar. Have a look in the handbook to see which fuse would be for a towbar and see if putting one in gives a 12 volt supply at the back.