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03-18-2006, 12:27 PM
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#1 |
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Registered User
Join Date: Mar 2005
Location: Just outside Durham, NC
Posts: 894
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b, r, g, y, bl???
I was hoping someone out there could point me in the right direction. I need to hook up a tach, and I have 5 wires, blue, red, green, yellow, and black. I am no good with wires, so if someone could walk me through it.....it would be appreciated.
Thanks!
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1969 SS 350 Camaro Sold 2008 1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's  1980 Chevy Malibu 2 dr Sold 2007 1993 Olds. Cutlass Ciera Wagon Traded 2006 2003 Saturn L200 w/5pd. D/D My list spans 5 decades with One common thread.....GM! |
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03-18-2006, 12:33 PM
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#2 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: b, r, g, y, bl???
What kind of tach?-Model #?
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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03-18-2006, 12:57 PM
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#3 |
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Registered User
Join Date: Mar 2005
Location: Just outside Durham, NC
Posts: 894
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Re: b, r, g, y, bl???
its a RAC tach, the number printed on the face of it is 63003580, thats all I know, won it online.
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1969 SS 350 Camaro Sold 2008 1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's 1980 Chevy Malibu 2 dr Sold 2007 1993 Olds. Cutlass Ciera Wagon Traded 2006 2003 Saturn L200 w/5pd. D/D My list spans 5 decades with One common thread.....GM! |
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03-18-2006, 12:59 PM
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#4 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: b, r, g, y, bl???
if it's a good aftermarket tach just google the manufacturer to getemail address or better yet call an 800number to get the info
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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03-18-2006, 01:57 PM
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#5 |
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Registered User
Join Date: Mar 2005
Location: Just outside Durham, NC
Posts: 894
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Re: b, r, g, y, bl???
been there, tried that.....couldn't come up with anything. I found some instructions that appear generic, but the color combo doesn't match. I pulled the cover, and the red, black, and green go together, so I assume that the red is the 12v power, the black is ground, and the green will be plugged into my dash lights. Now, I am left with a blue and yellow wire. The instructions I found said the two signal wires would be green and brown, so I am at a loss.....the instructions said to hook one to the neg. terminal on the coil, and use an inductive pickup to hook up to the coil wire lead.....but they also said this would be a special shielded wire.....and my tach has no such pickup......any ideas?
Oh, and when I pulled the cover, there are two white wires coming out of a seperate area of the back of the tach, that have tape over them.....they do not appear to have ever been connected to the original wire harness.....so I have no idea what they could/would do.
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1969 SS 350 Camaro Sold 2008 1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's 1980 Chevy Malibu 2 dr Sold 2007 1993 Olds. Cutlass Ciera Wagon Traded 2006 2003 Saturn L200 w/5pd. D/D My list spans 5 decades with One common thread.....GM! |
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03-18-2006, 04:43 PM
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#6 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: b, r, g, y, bl???
new one by me...sounds old and outdated.
NORMAL tachs...for the last 20 years or so, have had green for the coil neg... or tach terminal on the HEI, black ground, red switched power, and white to the dash lights. |
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03-18-2006, 04:54 PM
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#7 |
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Registered User
Join Date: Mar 2005
Location: Just outside Durham, NC
Posts: 894
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Re: b, r, g, y, bl???
it is old, but I was going for a classic look, didn't find any 'new' tachs that had the look I was going for......ttt hopefully someone can figure these wires out for me.
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1969 SS 350 Camaro Sold 2008 1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's 1980 Chevy Malibu 2 dr Sold 2007 1993 Olds. Cutlass Ciera Wagon Traded 2006 2003 Saturn L200 w/5pd. D/D My list spans 5 decades with One common thread.....GM! |
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03-18-2006, 05:54 PM
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#8 | |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: b, r, g, y, bl???
Quote:
http://www.musclecartachs.com/docs/referencerac.htm
__________________
56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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03-18-2006, 06:19 PM
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#9 |
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Registered User
Join Date: Mar 2005
Location: Just outside Durham, NC
Posts: 894
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Re: b, r, g, y, bl???
if it possible that the red, green, and black are my positive, ground, and neg. on the coil, and that the blue and yellow would be a positive and negative for the lights? The author in the link above states that sometimes the lights are white, but he has seen blue and yellow......is it possible this is a seperate circuit that requires another ground?
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1969 SS 350 Camaro Sold 2008 1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's 1980 Chevy Malibu 2 dr Sold 2007 1993 Olds. Cutlass Ciera Wagon Traded 2006 2003 Saturn L200 w/5pd. D/D My list spans 5 decades with One common thread.....GM! |
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03-18-2006, 09:31 PM
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#10 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: b, r, g, y, bl???
To see if it will work hook it this way:
1--Red to power source 2--green to negative on coil 3--black to ground 4--leave other wires off This sounds like a tach has to have a sending unit (one from the '60's)
__________________
56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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03-18-2006, 09:36 PM
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#11 |
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Crew Cut
Join Date: Dec 2005
Location: MONTGOMERY,AL
Posts: 757
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Re: b, r, g, y, bl???
also make sure you have it set for 4,6 or 8 cly
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85 SWB 1/2 TON CREWCAB/5.3 03 CHEV 3500 DURAMAX CREW CAB 85 CHEV SWB/TPI 06 CHEV TAHOE (WIFES) 30 MODEL A HOT ROD 07 HARLEY DAVIDSON BAGGER 09 STREET GLIDE AN  D A LOT MORE JUNK
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03-18-2006, 11:32 PM
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#12 |
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Registered User
Join Date: Mar 2005
Location: Just outside Durham, NC
Posts: 894
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Re: b, r, g, y, bl???
already set to 6cyl.
Does it have to be a fused power source? Not sure if I should piggy back off something else, or just run it to the battery.
__________________
1969 SS 350 Camaro Sold 2008 1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's 1980 Chevy Malibu 2 dr Sold 2007 1993 Olds. Cutlass Ciera Wagon Traded 2006 2003 Saturn L200 w/5pd. D/D My list spans 5 decades with One common thread.....GM! |
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03-19-2006, 10:28 AM
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#13 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: b, r, g, y, bl???
it has to be to a switched souurse... IGN unfused at teh fuse box. If you run it to the battery, you'll have a dead battery in the morning... or if it sits for a couple days anyways.
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