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08-12-2018, 10:16 PM | #1 |
Scooby Specialist
Member#: 310506
Join Date: Feb 2012
Chapter/Region:
South East
Location: Florida
Vehicle:2005 WRX STi CGM |
Accessory Fuse Box Wiring
Hey guys,
Adding some new gauges to my 05 STi and am going to be adding more down the line most likely. I ripped out my old prosport gauges and am installing Defis and want to do it right. I'm also installing a wide band which needs greater power than a typical gauge since the power line is used to heat the sensor. I'm looking to install a custom fuse box in the cabin to enable to me install new gauges/further accessories down the road and wanted to run the setup past you guys. Also curious where some of you may have mounted your fuse block inside the cabin. Here's what i'm thinking, in order to supply constant 12v and switched 12v to my accessories: What are your thoughts? Thanks!
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Last edited by BeastianSTI; 08-13-2018 at 12:53 AM. |
08-13-2018, 12:43 AM | #2 |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
I'd utilize a better bus-block that can deal with more than 1 input to keep things clean (switched and constant circuits in one block); ideally you'll have fuses and relays all in the block. Beyond that you've got a fairly top-level design you're showing us - might want to double-back when you're actually down in the weeds.
Unless you're wiring in some serious air horns or fog lamps, you don't need to do any of this. If you want to install an isolator or kill switch, that would be a good time to jump into something a little more in-depth like this. |
08-13-2018, 12:59 AM | #3 | |
Scooby Specialist
Member#: 310506
Join Date: Feb 2012
Chapter/Region:
South East
Location: Florida
Vehicle:2005 WRX STi CGM |
Quote:
The Defi gauges also mention they want dedicated power lines as well. #1 from Innovate: Code:
Circuits that share power with the vehicle's stereo, ignition system, ECU, lighting, or fuel pump should not be used. When in doubt, create an additional circuit using an automotive relay available at any automotive parts supplier. See the next section for a relay installation diagram. Code:
When several gauges are installed into a vehicle, use each power supply wire to connect gauges to the vehicle independently. Do not join multiple power supply wires. Do not share single fuse with multiple gauges. Every gauge requires independent fuse for IGN and +B line Thanks! |
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08-13-2018, 02:34 AM | #4 |
Scooby Specialist
Member#: 310506
Join Date: Feb 2012
Chapter/Region:
South East
Location: Florida
Vehicle:2005 WRX STi CGM |
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08-13-2018, 03:16 AM | #5 |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
The only thing that needs a dedicated power wire is the O2 heater - all the other stuff is low current.
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