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02-01-2010, 08:22 PM
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#1 |
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Registered User
Join Date: Oct 2009
Location: Edmonton Alberta Canada
Posts: 107
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what are these 3 wires for?
ok i just picked up a guage cluster from a 79 chev to take the spedometer from and put into mine(i would just use the whole thing but the new one has a electric oil pressure sensor mine doesnt) but on the back of the spedometer there is 3 wires and i dont know what they are for... the harness was already cut and i couldnt see the other end the green black and red
anyone know what theyre for? |
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02-01-2010, 08:26 PM
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#2 |
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I have car A.D.D.
Join Date: Feb 2009
Location: Greeley, Northern Colorado
Posts: 4,147
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Re: what are these 3 wires for?
That is the newer electronic speedo from an 87 & up (not 100% on the years).
__________________
-Gerald Building vehicles in memory of the first "car guy" I ever knew, my Grandpa. Bob Dunham 1935-2009. Rest in peace. 61 GMC Suburban SOLD The 86 build thread SOLD Are you a Colorado member?Click here. |
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02-01-2010, 09:28 PM
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#3 |
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Registered User
Join Date: Jul 2007
Location: Sims, NC
Posts: 531
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Re: what are these 3 wires for?
The speedometer is still cable driven, but it generates the vehicle speed signal for the ecm. That's what those wires are for. 87-89 (or 90) i believe. in 90 or 91 they started putting the VSS in the transmission or transfer case.
Mike |
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02-01-2010, 09:49 PM
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#4 |
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Account Suspended
Join Date: Dec 2007
Location: Unnapreciative, Trollville
Posts: 2,079
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Re: what are these 3 wires for?
Mr chevy hit it on the head.
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02-01-2010, 11:47 PM
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#5 |
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Registered User
Join Date: Oct 2009
Location: Edmonton Alberta Canada
Posts: 107
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Re: what are these 3 wires for?
Cool thx thecluster is the same size shap as mine and I pulled it out of a 79 so the po must have put it in... So the wires are of no use to me then?
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02-01-2010, 11:49 PM
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#6 |
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Senior Member
Join Date: May 2004
Location: Binghamton, NY
Posts: 3,454
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Re: what are these 3 wires for?
Nope, only a small bolt holds it on.
Not that it really matters, but think they were on back in the mid 80s, remember looking for some clusters and see that on there. IIRC it's for the lockup on the 700s.
__________________
2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 6” lift 1999 GMC Yukon 350/4L60 4" SAS |
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02-02-2010, 12:20 AM
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#7 |
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Registered User
Join Date: Oct 2009
Location: Edmonton Alberta Canada
Posts: 107
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Re: what are these 3 wires for?
Ok, is there any easier way to hook the speedo cable up other then removing the heater ducting and scratching the heck outa yer arm to reach it?
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02-02-2010, 12:26 AM
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#8 |
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Registered User
Join Date: May 2009
Location: San Antonio,Texas
Posts: 220
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Re: what are these 3 wires for?
Maybe its for cruz control?
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02-02-2010, 02:34 AM
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#9 |
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Registered User
Join Date: Dec 2009
Location: Winston, Ga.
Posts: 240
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Re: what are these 3 wires for?
My 86 GMC has that same connection that goes into a small connector behind the dash. I haven't followed it any further.
__________________
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