Hot fuse tap - Which fuse? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

cgrey · 07-25-2012, 07:10 PM

Anyone know, offhand, if any of the fuses are constant on with ignition off?

I need to tap for a powerbox/camera.

FRSPirate · 07-25-2012, 07:45 PM

There are some unused open terminals in there (cabin fuse box) that are constant hot. I remember running into them when i was wiring the remote line for my sub. Other than telling you to use multimeter or test light to figure it out, i have no idea offhand which are constant. If you do not have a test light, you could always make one with a spare 194 bulb, some wire and a couple alligator clips.

cgrey · 07-26-2012, 01:05 AM

Yeah, I'll have to bust out the multimeter and play with it. I expected the fusebox to be more easily accessible...and bigger.

Otherwise I'll try to find a wire to tap. Possibly the clock, or the dome light. Must be an always on power somewhere convenient.

xjohnx · 07-26-2012, 09:06 AM

Please document your findings, if you can. Pics would be helpful.

Lee358 · 07-26-2012, 09:56 AM

I think the only always hot lead in the drivers area is going to be the dome light.

Sent from my iPhone using Tapatalk

cgrey · 08-26-2012, 12:27 AM

Update: Looking for a hot fuse in the Scion FR-S or Subaru BRZ to wire an electronic device.

The STOP fuse, 7.5A, fourth from the top of the left column. Brake light circuit, it's hot.

For switched power plenty of options but I recommend the DRL circuit.

FYI Subaru uses short mini fuses, they're like mini fuses with cut blades and a slot in the middle. The box will accept normal mini fuses but you can't use a tap-a-fuse and still close the cover, not that the cover is very important.

Behind the plastic panel housing the hood release is plenty of space to hide excess wires or connectors.

cgrey · 08-26-2012, 05:42 AM

Someone posted this image:

pepe · 08-20-2015, 10:27 AM

I need to know a constant 12v and 12v fuse and the fuse only when ignition key is operational. I want to install Gauges.
Thank you!

Ahbrz · 09-17-2016, 03:06 PM

great info, thanks! i am just about to install my ls370 with hard wire kit, but was wondering which fuse is hot since i don't see dome fuse by itself.

QHawk · 09-17-2016, 08:24 PM

Quote:

I think the only always hot lead in the drivers area is going to be the dome light.

That's one, but the options connector (in the dash behind the HU) has another.

07-25-2012, 07:10 PM	#1
cgrey Senior Member Join Date: Jun 2012 Drives: 2013 Argento Silver FR-S Location: NYC Posts: 286 Thanks: 41 Thanked 203 Times in 74 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Hot fuse tap - Which fuse? Anyone know, offhand, if any of the fuses are constant on with ignition off? I need to tap for a powerbox/camera.

08-26-2012, 12:27 AM	#6
cgrey Senior Member Join Date: Jun 2012 Drives: 2013 Argento Silver FR-S Location: NYC Posts: 286 Thanks: 41 Thanked 203 Times in 74 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Update: Looking for a hot fuse in the Scion FR-S or Subaru BRZ to wire an electronic device. The STOP fuse, 7.5A, fourth from the top of the left column. Brake light circuit, it's hot. For switched power plenty of options but I recommend the DRL circuit. FYI Subaru uses short mini fuses, they're like mini fuses with cut blades and a slot in the middle. The box will accept normal mini fuses but you can't use a tap-a-fuse and still close the cover, not that the cover is very important. Behind the plastic panel housing the hood release is plenty of space to hide excess wires or connectors. Last edited by cgrey; 08-26-2012 at 05:40 AM.

07-26-2012, 01:05 AM	#3
cgrey Senior Member Join Date: Jun 2012 Drives: 2013 Argento Silver FR-S Location: NYC Posts: 286 Thanks: 41 Thanked 203 Times in 74 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Yeah, I'll have to bust out the multimeter and play with it. I expected the fusebox to be more easily accessible...and bigger. Otherwise I'll try to find a wire to tap. Possibly the clock, or the dome light. Must be an always on power somewhere convenient.

07-26-2012, 09:06 AM	#4
xjohnx Grip>Slip Join Date: Jun 2012 Drives: 13 SWP BRZ Ltd - Innovate Powered! Location: RVA Posts: 3,563 Thanks: 656 Thanked 1,717 Times in 1,031 Posts Mentioned: 45 Post(s) Tagged: 3 Thread(s)	Please document your findings, if you can. Pics would be helpful.

07-26-2012, 09:56 AM	#5
Lee358 Senior Member Join Date: Jun 2012 Drives: nissan frontier, DGM MT BRZ Location: North nj Posts: 1,576 Thanks: 404 Thanked 419 Times in 254 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	I think the only always hot lead in the drivers area is going to be the dome light. Sent from my iPhone using Tapatalk

08-26-2012, 05:42 AM	#7
cgrey Senior Member Join Date: Jun 2012 Drives: 2013 Argento Silver FR-S Location: NYC Posts: 286 Thanks: 41 Thanked 203 Times in 74 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Someone posted this image:

08-20-2015, 10:27 AM	#8
pepe Senior Member Join Date: Nov 2013 Drives: gt86 Location: spain Posts: 231 Thanks: 0 Thanked 7 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I need to know a constant 12v and 12v fuse and the fuse only when ignition key is operational. I want to install Gauges. Thank you!

09-17-2016, 03:06 PM	#9
Ahbrz Junior Member Join Date: Aug 2016 Drives: Brz Location: Toronto Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	great info, thanks! i am just about to install my ls370 with hard wire kit, but was wondering which fuse is hot since i don't see dome fuse by itself.

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