How many accessories can you safely connect? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

FutureFT86 · 04-14-2016, 07:42 AM

Hi guys,

I currently have 3 gauges tapped into the radio harness and now that I have added a few goodies to my engine I'm looking to run another 3.

Now these gauges can power each other, so I can plug them into each other instead of tapping each of them into a power source.

I'm wondering if it's safe to have them all running off the battery harness' power. Are there any dangers I should be worried about since I'm pulling more power from this single wire in the battery harness to power 6 gauges?

Thanks
Mike

Tcoat · 04-14-2016, 10:08 AM

Quote:

Originally Posted by FutureFT86

Hi guys,

I currently have 3 gauges tapped into the radio harness and now that I have added a few goodies to my engine I'm looking to run another 3.

Now these gauges can power each other, so I can plug them into each other instead of tapping each of them into a power source.

I'm wondering if it's safe to have them all running off the battery harness' power. Are there any dangers I should be worried about since I'm pulling more power from this single wire in the battery harness to power 6 gauges?

Thanks
Mike

What amperage are they pulling? Doubt it is much but that is the number you need to know.

FutureFT86 · 04-14-2016, 10:41 AM

Quote:

Originally Posted by Tcoat

What amperage are they pulling? Doubt it is much but that is the number you need to know.

Thanks for the reply!

From the manual it looks like the following for each gauge:

120mA to power
120mA to ignition
2mA to illumination

Thanks!

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Name: uploadfromtaptalk1460644877975.jpg
Views: 443
Size: 109.7 KB

Tcoat · 04-14-2016, 10:47 AM

Quote:

Originally Posted by FutureFT86

Thanks for the reply!

From the manual it looks like the following for each gauge:

120mA to power
120mA to ignition
2mA to illumination

Thanks!

Attachment 135398

So about .25 amps per gauge for a grand total of 1.5 for all. Don't know what the HU pulls but would think you have loads of leeway there.

WRBrzRX · 04-14-2016, 10:52 AM

Noob question I've been wondering, sorry, this seems a good place.

Would adding a rear camera and dashcam to a stock MY2013 Limited head unit be a problem with a lightweight battery?

http://store.kcmachine.com/products/...ckage-preorder

jslack · 01-31-2017, 03:45 AM

If you're worried about powering multiple items you can always run a SPDT relay which would let you power plenty of devices without overloading the head unit.

Tcoat · 01-31-2017, 06:17 AM

Quote:

Originally Posted by WRBrzRX

Noob question I've been wondering, sorry, this seems a good place.

Would adding a rear camera and dashcam to a stock MY2013 Limited head unit be a problem with a lightweight battery?

http://store.kcmachine.com/products/...ckage-preorder

No. They don't exactly suck back the power for the few seconds that you spend backing up.

04-14-2016, 07:42 AM	#1
FutureFT86 Senior Member Join Date: Aug 2011 Drives: 13 Scion FR-S Location: montreal Posts: 132 Thanks: 76 Thanked 16 Times in 15 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	How many accessories can you safely connect? Hi guys, I currently have 3 gauges tapped into the radio harness and now that I have added a few goodies to my engine I'm looking to run another 3. Now these gauges can power each other, so I can plug them into each other instead of tapping each of them into a power source. I'm wondering if it's safe to have them all running off the battery harness' power. Are there any dangers I should be worried about since I'm pulling more power from this single wire in the battery harness to power 6 gauges? Thanks Mike __________________ Check out my build: Instagram @kawallito

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04-14-2016, 10:52 AM	#5
WRBrzRX Senior Member Join Date: Nov 2015 Drives: runs&drives Location: CA Posts: 123 Thanks: 304 Thanked 95 Times in 55 Posts Mentioned: 3 Post(s) Tagged: 1 Thread(s)	Noob question I've been wondering, sorry, this seems a good place. Would adding a rear camera and dashcam to a stock MY2013 Limited head unit be a problem with a lightweight battery? http://store.kcmachine.com/products/...ckage-preorder

01-31-2017, 03:45 AM	#6
jslack Senior Member Join Date: Dec 2016 Drives: 2017 Red subaru BRZ Limited Location: Omaha Posts: 191 Thanks: 5 Thanked 13 Times in 12 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	If you're worried about powering multiple items you can always run a SPDT relay which would let you power plenty of devices without overloading the head unit.

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