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Old 02-07-2004, 06:11 PM   #1
BritSti
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Default Right ignition coil wire for tach sense on STi?

In the middle of a remote start install on my 04 Sti, looking to tap into a tach wire on the ignition coil harness below the window washer fluid reservoir.

Anyways, I've checked out Netz's explanation of which wire to go for, but it is not clear which coil I am looking at.

Below the washer I see to main conectors, the top one being brown, the one below being black. I do see a solid yellow wire which may be the ignition coil 4 pin 8 yellow wire for the tach, however, not sure this is correct, as the space is so tight pin numbers are not really available....

Any suggestions on this, or should I just go for the tach off the ecm...

Thanks.

S
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Old 02-07-2004, 07:04 PM   #2
Mulder
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You should be able to tap the tachometer output at the ECU rather than an individual coil.
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Old 02-07-2004, 07:16 PM   #3
netZ
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yes, unfortunately some aftermarket alarm/remote starters have difficulty learning off the ecu's tach wire though. the ignition coil wires works best with the viper alarm/remote start systems.

netZ

Quote:
Originally posted by Mulder
You should be able to tap the tachometer output at the ECU rather than an individual coil.
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Old 02-07-2004, 07:22 PM   #4
Mulder
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Ok, now that you're in this thread I'll go away
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Old 02-07-2004, 07:24 PM   #5
netZ
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it's all good!
netZ

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Originally posted by Mulder
Ok, now that you're in this thread I'll go away
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Old 02-07-2004, 07:55 PM   #6
BritSti
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Default You guys are quick

Ahh, thanks for the responses guys, I would say right now I am more comfortable going for the coil wire at the ECU (B18 Yellow).. would you say this would be better than the tach (a23 green) at the ECU level or should I focus on the coil harness in the engine bay (Brown F60 - Thanks for the update on that NetZ).

S


Last edited by BritSti; 02-07-2004 at 08:00 PM.
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Old 02-07-2004, 08:29 PM   #7
netZ
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brit,

it's really up to you, since i have to route wires for the hood pin, siren etc, i include the tach sense wire as well. also, since my hands are pretty small it's easy for me to tap into the ignition coil wire. i also try to reduce alarm/remote start wires from straying all over to keep the install neat and stealth.

in summary... either location is fine.

netZ

Last edited by netZ; 02-07-2004 at 08:34 PM.
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Old 11-10-2009, 05:06 PM   #8
ZachSmithkl
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I am also looking for which coil wire I should tap on my 2005 WRX for my viper 5901. Right now the remote start turns on but it sounds like the remote start isnt letting go of the starter
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Old 11-10-2009, 07:48 PM   #9
Mulder
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Please don't bump ancient threads, this one is five years old. Also this is not the proper forum, we have a Car Stereo and Security forum.
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