Automotive wiring colour coding

Submitted: Sunday, Feb 15, 2009 at 12:50
ThreadID: 65999 Views:3182 Replies:4 FollowUps:4
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I am about to change an electric tachometer. the one currently in use is a 2 inch Speco and the wiring color coding is A-Green connects to the coil, B-Black connects to earth, C-Red connects to power at ignition. The replacement tachometer in unbranded and the three wires coming from it are coloured Blue, Orange & Yellow. Could anybody advise me which goes where ?
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Reply By: Shaker - Sunday, Feb 15, 2009 at 12:57

Sunday, Feb 15, 2009 at 12:57
What make is it?
They may have a website.
AnswerID: 349173

Follow Up By: Tony C - Sunday, Feb 15, 2009 at 15:07

Sunday, Feb 15, 2009 at 15:07
The replacement tacho is secondhand, no brandname showing and I don't have an instruction sheet.
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FollowupID: 617423

Reply By: oldtrack123 - Sunday, Feb 15, 2009 at 13:14

Sunday, Feb 15, 2009 at 13:14
Hi
Didn't it have a wiring diagram supplied?
Those colours could mean anything.!!
AnswerID: 349175

Follow Up By: Tony C - Sunday, Feb 15, 2009 at 15:09

Sunday, Feb 15, 2009 at 15:09
Please see my reply to Shaker
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FollowupID: 617424

Follow Up By: oldtrack123 - Sunday, Feb 15, 2009 at 22:21

Sunday, Feb 15, 2009 at 22:21
Hi Tony
I think you now have a problem, it was not cheap after all if you connect it wrong & blow something.
There are no standard colours as far as I know in car wiring,& or accessories.
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FollowupID: 617529

Reply By: Member - Stuart P (WA) - Sunday, Feb 15, 2009 at 13:43

Sunday, Feb 15, 2009 at 13:43
yellow may be the ign feed ,orange coil may be, blue is a colour sometimes used for lights?
AnswerID: 349179

Follow Up By: Tony C - Sunday, Feb 15, 2009 at 15:10

Sunday, Feb 15, 2009 at 15:10
Please see my reply to Shaker
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FollowupID: 617426

Reply By: Member - Graham H (QLD) - Sunday, Feb 15, 2009 at 15:16

Sunday, Feb 15, 2009 at 15:16
why not ask the guy who you bought it off how it was wired up when he had it or was it still warm when you got it and he didnt know


LOL


AnswerID: 349199

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