Quick question

rdecker20 · 07-18-2012, 02:51 PM

I need to tap into a wire that is only on while cranking preferably under the dash somewhere. Also in an 05 sti. If anyone could help me quick I'd appreciate it. Thanks

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aerosaaber · 07-18-2012, 08:07 PM

A wire that has power only when cranking? I think the only wire that fits the description would be the one that carries the signal from the ignition to starter solenoid (or wherever it goes in between)

what is it for?

rdecker20 · 07-18-2012, 09:46 PM

I may have not been specific enough. I need 12v to power a relay only while the car is running so the relay is not energized while the car is off.

El-ZackO · 07-18-2012, 10:52 PM

Stereo power line? Or possibly amp power line (if amp/sub installed)

J.Gibbs · 07-19-2012, 09:05 AM

You need a switched power source. Radio or cig lighter power wires will work fine. Just test whatever wire you use with a test light and make sure it shuts off when the ignition is turned off

aerosaaber · 07-19-2012, 08:21 PM

OK, that makes a lot more sense.
TONS of options for that, I usually use an "add-a-circuit" that plugs into a fuse location and give me a wire w/ it's own fuse. I can't remember which fuse I normally use.

J.Gibbs · 07-19-2012, 10:10 PM

Quote:

Originally Posted by aerosaaber

OK, that makes a lot more sense.
TONS of options for that, I usually use an "add-a-circuit" that plugs into a fuse location and give me a wire w/ it's own fuse. I can't remember which fuse I normally use.

I always use inline fuses with any new power wire that I add which isn't wired into a fuse block. Better safe than sorry

aerosaaber · 07-20-2012, 07:55 PM

fuses are great, until they start acting all "hey I look ok, but really I've failed, but I look ok so go search for a problem for 3 hours before just swapping me with a good fuse and solve the problem" lol rage.

aerosaaber · 07-20-2012, 07:56 PM

(I always run fuses on stuff, I don't want to burn my car down)

07-18-2012, 02:51 PM	#1
rdecker20 Scooby Newbie Member#: 309444 Join Date: Feb 2012 Chapter/Region: Tri-State Location: clark nj Vehicle: 2005 sti	Quick question I need to tap into a wire that is only on while cranking preferably under the dash somewhere. Also in an 05 sti. If anyone could help me quick I'd appreciate it. Thanks * Registered users of the site do not see these ads.

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07-18-2012, 08:07 PM	#2
aerosaaber Scooby Specialist Member#: 33850 Join Date: Mar 2003 Chapter/Region: NESIC Location: Pittsfield, MA Vehicle: 2006 WRX Wagon WRC Blue	A wire that has power only when cranking? I think the only wire that fits the description would be the one that carries the signal from the ignition to starter solenoid (or wherever it goes in between) what is it for?

07-18-2012, 09:46 PM	#3
rdecker20 Scooby Newbie Member#: 309444 Join Date: Feb 2012 Chapter/Region: Tri-State Location: clark nj Vehicle: 2005 sti	I may have not been specific enough. I need 12v to power a relay only while the car is running so the relay is not energized while the car is off.

07-18-2012, 10:52 PM	#4
El-ZackO Scooby Newbie Member#: 271260 Join Date: Jan 2011 Chapter/Region: NWIC Location: Lacey Vehicle: 99 OBS Green/Grey	Stereo power line? Or possibly amp power line (if amp/sub installed)

07-19-2012, 09:05 AM	#5
J.Gibbs Scooby Specialist Member#: 312107 Join Date: Mar 2012 Chapter/Region: NESIC Location: Sterling Vehicle: 1998 LowFoz Glacier White	You need a switched power source. Radio or cig lighter power wires will work fine. Just test whatever wire you use with a test light and make sure it shuts off when the ignition is turned off

07-19-2012, 08:21 PM	#6
aerosaaber Scooby Specialist Member#: 33850 Join Date: Mar 2003 Chapter/Region: NESIC Location: Pittsfield, MA Vehicle: 2006 WRX Wagon WRC Blue	OK, that makes a lot more sense. TONS of options for that, I usually use an "add-a-circuit" that plugs into a fuse location and give me a wire w/ it's own fuse. I can't remember which fuse I normally use.

07-20-2012, 07:55 PM	#8
aerosaaber Scooby Specialist Member#: 33850 Join Date: Mar 2003 Chapter/Region: NESIC Location: Pittsfield, MA Vehicle: 2006 WRX Wagon WRC Blue	fuses are great, until they start acting all "hey I look ok, but really I've failed, but I look ok so go search for a problem for 3 hours before just swapping me with a good fuse and solve the problem" lol rage.

07-20-2012, 07:56 PM	#9
aerosaaber Scooby Specialist Member#: 33850 Join Date: Mar 2003 Chapter/Region: NESIC Location: Pittsfield, MA Vehicle: 2006 WRX Wagon WRC Blue	(I always run fuses on stuff, I don't want to burn my car down)