Easy 12V constant and 12V switched to tap into?

squid267 · 12-25-2016, 02:08 PM

Hi I'm trying to wire my boost gauge (Tanabe Revel Boost Gauge)

The instructions calls for tapping into a 12V constant and 12V switched. I googled a bit and found conflicting reports for the 12V constant. I read cigarette lighter was constant in one thread and switched in another thread.

I'm hoping to just use two of those add a circuits things in the interior fuse box.

Any ideas on which fuse to be adding for constant and which one for switched?

Thanks and Merry Christmas!

squid267 · 12-26-2016, 02:27 PM

Update: Gave in and added a wire from battery to my gauge with 15amp fuse for constant. Tapped cigarette light for the switched source. Took me a couple hours but it works great!

Jayhovah · 12-27-2016, 09:47 AM

Looks like you got it figured....

If you pull the fuse panel in the drivers foot well, you can usually figure which circuits will be constant or switched..(confirm with a meter) then just use the add-a-circuits. I used them to add terminal blocks for switched and constant so that adding new accessories going forward is super easy and clean.

JARblue · 12-27-2016, 10:05 AM

The start (ignition) fuse I think is the only one in the drive side fuse box that has constant power. I have power for my homelink mirror wired to it so I can open/close the garage door without the car having to be on.

A dedicated line from the battery works, too, of course.

12-25-2016, 02:08 PM	#1 (permalink)
squid267 Base Member Join Date: May 2013 Location: Worcester, MA Posts: 207 Drives: 12 Nismo 370Z PW M6 Rep Power: 37	Easy 12V constant and 12V switched to tap into? Hi I'm trying to wire my boost gauge (Tanabe Revel Boost Gauge) The instructions calls for tapping into a 12V constant and 12V switched. I googled a bit and found conflicting reports for the 12V constant. I read cigarette lighter was constant in one thread and switched in another thread. I'm hoping to just use two of those add a circuits things in the interior fuse box. Any ideas on which fuse to be adding for constant and which one for switched? Thanks and Merry Christmas!

12-27-2016, 10:05 AM	#4 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,449 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	The start (ignition) fuse I think is the only one in the drive side fuse box that has constant power. I have power for my homelink mirror wired to it so I can open/close the garage door without the car having to be on. A dedicated line from the battery works, too, of course. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

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12-26-2016, 02:27 PM	#2 (permalink)
squid267 Base Member Join Date: May 2013 Location: Worcester, MA Posts: 207 Drives: 12 Nismo 370Z PW M6 Rep Power: 37	Update: Gave in and added a wire from battery to my gauge with 15amp fuse for constant. Tapped cigarette light for the switched source. Took me a couple hours but it works great!