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 04-19-2014, 02:53 PM   #1
bowcoffin
Registered User
 
Join Date: Apr 2014
Location: West Jordan, UT
Posts: 189
68 C20 Wiring Problem

Hey guys,

I recently bought a 68 c20 custom camper 350. The guy that I bought it from was in the process of wiring in a new Painless Wiring harness (Item # 10206 if you search for it) and didnt finish everything. It looks like for the most part everything he did is good. The only think that I have found (And it is driving me NUTS) is that the ignition must me messed up. It turns over PERFECT, no problems. When I go to turn off the engine though, it will not turn off and I have to pull the switch that runs directly to the Cap and Rotor (Spark plugs). Any ideas as to what he did wrong? Diagrams or color coded wires to look for helps- I dont know much about wiring
bowcoffin is offline   Reply With Quote
Old 04-19-2014, 03:02 PM   #2
FstCarsNGuitars
Registered User
 
FstCarsNGuitars's Avatar
 
Join Date: Jul 2013
Location: Chandler, Arizona
Posts: 58
Re: 68 C20 Wiring Problem

Quote:
Originally Posted by bowcoffin View Post
Hey guys,

Diagrams or color coded wires to look for helps- I dont know much about wiring
check this link, it has saved me a bunch of times

http://outintheshop.com/faq/wiring/wiring.htm
FstCarsNGuitars is offline   Reply With Quote
Old 04-19-2014, 03:38 PM   #3
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,356
Re: 68 C20 Wiring Problem

Start the truck up and shut off the key, truck still runs, at that point unplug the alternator and see what happens. OR, first....see if there is voltage at the plus side of the coil before you start it
kwmech is offline   Reply With Quote
Old 04-19-2014, 04:00 PM   #4
bowcoffin
Registered User
 
Join Date: Apr 2014
Location: West Jordan, UT
Posts: 189
Re: 68 C20 Wiring Problem

Ok will do! I wont be able to try that till monday but I will keep you up to date! Thanks for that Diagram, that is way more detailed than any of the others I have seen!
bowcoffin is offline   Reply With Quote
Old 04-22-2014, 06:23 PM   #5
bowcoffin
Registered User
 
Join Date: Apr 2014
Location: West Jordan, UT
Posts: 189
Re: 68 C20 Wiring Problem

Figured it out! The excitor wire was wired to the carb. wrong.. just needed to switch the two wires going into the carb and it fixed my problem! Thanks for all the help!
bowcoffin is offline   Reply With Quote
Old 04-22-2014, 06:56 PM   #6
bowcoffin
Registered User
 
Join Date: Apr 2014
Location: West Jordan, UT
Posts: 189
Re: 68 C20 Wiring Problem

Just realized I said carb... meant alternator....
bowcoffin is offline   Reply With Quote
Old 05-10-2014, 03:47 PM   #7
bowcoffin
Registered User
 
Join Date: Apr 2014
Location: West Jordan, UT
Posts: 189
Re: 68 C20 Wiring Problem

Does anyone have a diagram of how the starter is supposed to be wired? Thought I figured this out but the battery is still draining even while off.. If I unplug the alternator there is no drain but as soon as I plug it back in it starts to drain again... Tried flipping the exciter wire and the battery wire and there was no luck...
bowcoffin is offline   Reply With Quote
Reply

Bookmarks

Tags
wiring help, wiring issue, wiring problem, wiring trouble

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 06:34 PM.


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