12V ignition live in boot

Easington · Feb 27th, 2022, 13:40

Hi all

I'm looking for a 12v live supply in the tailgate area of my 2016 V60 which is only live with the ignition on. I thought the HRW fuse in the cargo fusebox would be a safe bet but no it appears to be live all the time.

Thanks

BJB · Feb 27th, 2022, 16:30

I also wanted a switched live for a rear dashcam. Ended up using a piggyback fuse holder on the cig lighter fuse (smaller fuse box under glove box), the cable does easily tuck under sill strips and an earth on rear chassis in boot.
I did check out boot power feeds, but none switched. I have a towbar module that has a switched live, but only shuts off when the electric system dropped to 12.7v (didn't want adjust anything in module)
On my old V50, I used a relay, which used cont cig live, but controlled by DRL power.

Easington · Feb 28th, 2022, 07:41

That's the route I'm thinking down, bring a live from the front. It wouldn't be a problem if the 12v socket in the boot wasn't live all the time

BJB · Feb 28th, 2022, 09:26

Just don't forget to check that the new supply hasn't bypassed the fuse (depends which way the piggyback fuse is inserted) by checking for no live with fuse removed, with Ign on.(Easily done)

Easington · Feb 28th, 2022, 12:02

Quote:

Originally Posted by BJB

Just don't forget to check that the new supply hasn't bypassed the fuse (depends which way the piggyback fuse is inserted) by checking for no live with fuse removed, with Ign on.(Easily done)

I don't see how that is possible.

The supply to the new wire will either go through both on the piggyback on just it's own

BJB · Feb 28th, 2022, 12:52

It is.... If you connect the Wire side (which would go to the back) of the piggyback into the power SUPPLY side main cigarette fuse, it wouldn't be covered by a fuse because it's just plugged straight into live.

BJB · Feb 28th, 2022, 13:20

SORRY, I do apologise, if connected the wrong way it won't have power..

Easington · Feb 28th, 2022, 13:23

I think you'll find the piggy back will only supply via it's own fuse and just uses the car's fuse as a power source.

Feb 27th, 2022, 13:40	#1
Easington Master Member Last Online: Jul 28th, 2023 12:45 Join Date: Oct 2018 Location: Lincolnshire	12V ignition live in boot Hi all I'm looking for a 12v live supply in the tailgate area of my 2016 V60 which is only live with the ignition on. I thought the HRW fuse in the cargo fusebox would be a safe bet but no it appears to be live all the time. Thanks __________________ V60 Cross Country D4 (2.4 5 cylinder) AWD Lux Nav Geartronic 2016 - Electric Silver, Polestar Optimisation and Police Spec Dipstick

Feb 28th, 2022, 07:41	#3
Easington Master Member Last Online: Jul 28th, 2023 12:45 Join Date: Oct 2018 Location: Lincolnshire	That's the route I'm thinking down, bring a live from the front. It wouldn't be a problem if the 12v socket in the boot wasn't live all the time __________________ V60 Cross Country D4 (2.4 5 cylinder) AWD Lux Nav Geartronic 2016 - Electric Silver, Polestar Optimisation and Police Spec Dipstick

Feb 28th, 2022, 13:23	#8
Easington Master Member Last Online: Jul 28th, 2023 12:45 Join Date: Oct 2018 Location: Lincolnshire	I think you'll find the piggy back will only supply via it's own fuse and just uses the car's fuse as a power source. __________________ V60 Cross Country D4 (2.4 5 cylinder) AWD Lux Nav Geartronic 2016 - Electric Silver, Polestar Optimisation and Police Spec Dipstick

Feb 27th, 2022, 16:30	#2
BJB Member Last Online: Mar 7th, 2024 19:05 Join Date: Oct 2011 Location: Ashley Heath	I also wanted a switched live for a rear dashcam. Ended up using a piggyback fuse holder on the cig lighter fuse (smaller fuse box under glove box), the cable does easily tuck under sill strips and an earth on rear chassis in boot. I did check out boot power feeds, but none switched. I have a towbar module that has a switched live, but only shuts off when the electric system dropped to 12.7v (didn't want adjust anything in module) On my old V50, I used a relay, which used cont cig live, but controlled by DRL power.

Feb 28th, 2022, 09:26	#4
BJB Member Last Online: Mar 7th, 2024 19:05 Join Date: Oct 2011 Location: Ashley Heath	Just don't forget to check that the new supply hasn't bypassed the fuse (depends which way the piggyback fuse is inserted) by checking for no live with fuse removed, with Ign on.(Easily done)

Feb 28th, 2022, 12:52	#6
BJB Member Last Online: Mar 7th, 2024 19:05 Join Date: Oct 2011 Location: Ashley Heath	It is.... If you connect the Wire side (which would go to the back) of the piggyback into the power SUPPLY side main cigarette fuse, it wouldn't be covered by a fuse because it's just plugged straight into live.

Feb 28th, 2022, 13:20	#7
BJB Member Last Online: Mar 7th, 2024 19:05 Join Date: Oct 2011 Location: Ashley Heath	SORRY, I do apologise, if connected the wrong way it won't have power..

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