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#1 |
Moderator
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Location: ON, Canada
Posts: 2,159
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Tach wiring help?
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#2 |
Registered User
Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
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Re: Tach wiring help?
Pink wire to ignition
Gray wire to dash lights Brown wire to neg - side of coil Pink wire to pos + side of gauge. Brown wire to - side of gauge. In your case it looks like you have a black wire for the light and not grey which would have been factory color. Also.....HEI or coil?
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1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer |
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#3 |
Registered User
Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
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Re: Tach wiring help?
Also....great thread here....go to tech articles.....install tach 64-66
http://www.earlyclassic.com/tech.aspx?category=Install Tach 64-66 Chevy3
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1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer |
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#4 |
Check The Champ, Demonstrator
![]() Join Date: Jun 2009
Location: Montreal,Quebec
Posts: 6,627
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Re: Tach wiring help?
The black top wire is for a light is it not?
Red terminal to the + of the coil. It looks like you would not need a sender unit. Do you have a Chevy or GMC? On Chevrolet it went through a grommet along with the windshield washer hoses? Did I remember correctly?
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1963 Chevrolet Truck Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original Chevrolet Truck Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1 |
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#5 |
Moderator
![]() Join Date: Dec 2012
Location: ON, Canada
Posts: 2,159
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Re: Tach wiring help?
I have a Chevy 230. Original points.
That black wire at top is coming out of the light housing, for sure. |
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#6 |
Senior Enthusiast
Join Date: Feb 2007
Location: Spokane Valley, WA
Posts: 8,356
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Re: Tach wiring help?
The following link is the closest I can find to your exact tachometer:
http://www.classicglastron.com/phpbb...pic.php?t=7376 Also, blowing the photo up 400% and sharpening the image a bit, it appears there are very faint + and - marks indicating the post orientations in the original 2nd photo: ![]() It also appears this unit was manufactured by AC Delco. There are a few pictures of them on Google Images.
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My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=444502 Last edited by markeb01; 05-21-2015 at 02:26 PM. |
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#7 |
Moderator
![]() Join Date: Dec 2012
Location: ON, Canada
Posts: 2,159
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Re: Tach wiring help?
Thanks. Great detective work! For 20 bucks, I think I'll give it a shot.
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#8 |
Senior Enthusiast
Join Date: Feb 2007
Location: Spokane Valley, WA
Posts: 8,356
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Re: Tach wiring help?
Correction - I found another similar tach on Images, and it clearly shows the upper center stud being the 12v connection (as does yours). This means one of the lower studs is for ground, and the other is for the signal wire, not 12 volts positive. Unfortunately I can't detect any markings on this other tach even under extreme magnification, so I would suggest doing low voltage testing of the gauge to determine which is the correct post before "going live":
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My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=444502 |
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#9 |
Registered User
Join Date: Sep 2012
Location: oceanside CA
Posts: 706
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Re: Tach wiring help?
i agree with Markeb ^^^^^^^^^^^^
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#10 |
Registered User
Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
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Re: Tach wiring help?
Have you taken the mounting bracket off to see if theres any id there?
I definitely agree the red post should be the pos
__________________
1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer |
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#11 |
Moderator
![]() Join Date: Dec 2012
Location: ON, Canada
Posts: 2,159
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Re: Tach wiring help?
Maybe... 12V+ on the red post (and the light lead), coil+ on the + post, ground on the - post... just thinking out loud.
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