The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-14-2007, 04:49 PM   #1
kamikazekyle05
Registered User
 
kamikazekyle05's Avatar
 
Join Date: Nov 2007
Location: Vernon, Texas
Posts: 331
Tach Help

Hi yall, i just got my truck, and it already has a tach in it, it worked but since has stopped, the external regulator? went out on the truck right before i bought it, dont know if that has anything to do with it, any help on what might be the problem or where to start looking, Thanks Kyle
kamikazekyle05 is offline   Reply With Quote
Old 12-14-2007, 05:39 PM   #2
red71cheyenne
Back in the sticks
 
red71cheyenne's Avatar
 
Join Date: Jan 2001
Location: Fordland, MO
Posts: 3,188
Re: Tach Help

Need more info. Is this a stock in dash, or aftermarket tach? Are all the wires hooked up? Also need to know how it is wired. Is this an HEI, or coil truck? Where is it powered from? Fuse box? More info please.
__________________
1971 Cheyenne C-10 w/700R4 and Tuned Port Injection
1969 K5 Blazer w/Tuned Port
2010 2SS/RS Flaming Orange Camaro
2011 K1500 Suburban
2014 K1500 Pickup
2008 Nissan Altima? The wifes' hoopty
red71cheyenne is offline   Reply With Quote
Old 12-15-2007, 02:49 PM   #3
kamikazekyle05
Registered User
 
kamikazekyle05's Avatar
 
Join Date: Nov 2007
Location: Vernon, Texas
Posts: 331
Re: Tach Help

Sorry its stock tach(or aftermarket from lmc but stock lookalike), i tried tracing the wires today, started at the distributor, followed through the firewall, to the fuse box, then it looks like its spliced and then i couldnt follow where it goes
kamikazekyle05 is offline   Reply With Quote
Old 12-15-2007, 03:51 PM   #4
WorkinLonghorn
Senior Member
 
WorkinLonghorn's Avatar
 
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,883
Re: Tach Help

so it doesn't work at all? Then I'd remove the wire at the coil and totally clean up the connection and re-install,as a first step.
__________________
'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.
WorkinLonghorn is offline   Reply With Quote
Old 12-15-2007, 07:27 PM   #5
red71cheyenne
Back in the sticks
 
red71cheyenne's Avatar
 
Join Date: Jan 2001
Location: Fordland, MO
Posts: 3,188
Re: Tach Help

Pink wire should go to a pink in the fuse box and the brown goes to the tach lead on the HEI. If you don't have an HEI, it goes to the + on the coil. If those are hooked up, you may have a bad tach.
__________________
1971 Cheyenne C-10 w/700R4 and Tuned Port Injection
1969 K5 Blazer w/Tuned Port
2010 2SS/RS Flaming Orange Camaro
2011 K1500 Suburban
2014 K1500 Pickup
2008 Nissan Altima? The wifes' hoopty
red71cheyenne is offline   Reply With Quote
Old 12-16-2007, 01:41 AM   #6
byrd
Union Electrician
 
byrd's Avatar
 
Join Date: Feb 2005
Location: Louisville, Ky.
Posts: 3,354
Re: Tach Help

Quote:
Originally Posted by red71cheyenne View Post
Pink wire should go to a pink in the fuse box and the brown goes to the tach lead on the HEI. If you don't have an HEI, it goes to the + on the coil. If those are hooked up, you may have a bad tach.

The brown signal wire goes on the Negative side of the coil, when not using HEI.
__________________
69 Custom-10 SWB FLEETSIDE 350/350 TH Dropped 3.5/5.5"
Help support the board->HERE
Board vendors -> Vendors list
Zip:40272
Big Sandy Survivor...

Quote:
We cannot choose the way we die, but we can choose the way we live
Quote:
If you can't fix it with a hammer, you've got an electrical problem.
Quote:
I think Congressmen should wear uniforms like NASCAR drivers so we could identify their corporate sponsors
byrd is offline   Reply With Quote
Old 12-16-2007, 04:22 PM   #7
kamikazekyle05
Registered User
 
kamikazekyle05's Avatar
 
Join Date: Nov 2007
Location: Vernon, Texas
Posts: 331
Re: Tach Help

Thanks guys, ill try pullin the wire and re installing, and see if i get anything, on a side note it is a hei, cuz the brown wire goes to the tach lead, and the pink to the fuse box
kamikazekyle05 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:46 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com