How much extra power can I draw from the fuseboxes? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Achilles · 12-15-2014, 03:30 AM

Pretty much I'm looking at adding an aftermarket amp that'll probably draw around 15A max. My question is: are there main fuses for the 2 fuseboxes (interior instrument panel fusebox and engine bay fusebox)? If so how big are they and how much headroom have I got to play with if I draw supply from one of the spare slots on either of those 2 fuseboxes? If there isn't enough "spare" amperage I'll have to draw directly from the battery but I'd like to avoid that if possible hence why I'm asking.

Thanks in advance

Chimera · 12-15-2014, 07:49 AM

You should not do what you are looking to do, as the house wiring can only handle so much as well, for example if you get a 25A amp you probably want to run 8g wiring. Just my opinion. As far as the box having a master fuse, to my knowledge this does not exist.

Koa · 12-15-2014, 12:28 PM

Quote:

Originally Posted by Chimera

You should not do what you are looking to do, as the house wiring can only handle so much as well, for example if you get a 25A amp you probably want to run 8g wiring. Just my opinion. As far as the box having a master fuse, to my knowledge this does not exist.

This x 10000000

Do not skimp out on power. Spend the extra $50-100 bucks for a wiring kit and take the hour or so to run those wires.

Achilles · 12-15-2014, 02:43 PM

Quote:

Originally Posted by Chimera

You should not do what you are looking to do, as the house wiring can only handle so much as well, for example if you get a 25A amp you probably want to run 8g wiring. Just my opinion. As far as the box having a master fuse, to my knowledge this does not exist.

If the fusebox has no master fuse to protect its own wiring I wouldn't attempt it. Like you say, wouldn't want to push the stock wiring to far. I just thought there may have been some heads to play with given the number of spare fuse slots.

B-R-Z · 12-15-2014, 11:09 PM

Run a legit power line from the battery dude. Its super easy and power wire can be purchased super cheap on eBay.

brianhj · 12-16-2014, 03:47 AM

Quote:

Originally Posted by B-R-Z

Run a legit power line from the battery dude. Its super easy and power wire can be purchased super cheap on eBay.

This

Achilles · 12-16-2014, 04:17 AM

Quote:

Originally Posted by B-R-Z

Run a legit power line from the battery dude. Its super easy and power wire can be purchased super cheap on eBay.

Yeah, will do. Getting cable isn't an issue I'm a sparky.

12-15-2014, 03:30 AM	#1
Achilles Junior Member Join Date: Nov 2013 Drives: Grey GTS 86 Location: Melbourne Posts: 7 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	How much extra power can I draw from the fuseboxes? Pretty much I'm looking at adding an aftermarket amp that'll probably draw around 15A max. My question is: are there main fuses for the 2 fuseboxes (interior instrument panel fusebox and engine bay fusebox)? If so how big are they and how much headroom have I got to play with if I draw supply from one of the spare slots on either of those 2 fuseboxes? If there isn't enough "spare" amperage I'll have to draw directly from the battery but I'd like to avoid that if possible hence why I'm asking. Thanks in advance

12-15-2014, 07:49 AM	#2
Chimera Senior Member Join Date: Dec 2013 Drives: FRS Location: Atlanta Posts: 1,181 Thanks: 575 Thanked 291 Times in 216 Posts Mentioned: 17 Post(s) Tagged: 1 Thread(s)	You should not do what you are looking to do, as the house wiring can only handle so much as well, for example if you get a 25A amp you probably want to run 8g wiring. Just my opinion. As far as the box having a master fuse, to my knowledge this does not exist. __________________ Car Journal: http://www.ft86club.com/forums/showthread.php?p=1513783

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