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 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 06-30-2009, 07:40 AM   #1
BillyBlaze
Registered User
 
Join Date: Jun 2009
Location: Springtown,Tx.
Posts: 60
I need help, frying coils

I really need some help here, I am chasing around a problem and dont know what to do about it.

I have bought so far....
a battery
coil.....now fried
starter
plugs
plug wires
safety neutral switch
distributor cap

and now a ignition switch and key set for the column (not installed)

Right now the key is hard to turn off but IS turning off, it will start whn the battery is charged....however the thing is somehow drawing power and draining the battery and frying the coil, unless I remove the battery terminal.
I am going to try and put on the ignition switch today and see if that helps.

I am just about out of ideas without replacing the whole freakin wiring harness.
I am asking if you guys might have experienced this thing before and can help a brutha out?
BillyBlaze is offline   Reply With Quote
Old 06-30-2009, 07:54 AM   #2
tvblazer78
Low & Fast!
 
tvblazer78's Avatar
 
Join Date: Jan 2007
Location: Knoxville, TN
Posts: 3,110
Re: I need help, frying coils

Wow.. Anyone?
tvblazer78 is offline   Reply With Quote
Old 06-30-2009, 08:22 AM   #3
Jonboy
Slots go on anything!
 
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
Re: I need help, frying coils

If you have gone that far, just swap it to HEI. You shouldn't have to worry about frying colis (and points) with one, and it should be a bit more reliable, too.

I would get the switch looked at pretty soon, too, if you suspect it is staying on.
Jonboy is offline   Reply With Quote
Old 06-30-2009, 08:35 AM   #4
BillyBlaze
Registered User
 
Join Date: Jun 2009
Location: Springtown,Tx.
Posts: 60
Re: I need help, frying coils

The reason I bought this truck is for the fact it has no computer. I really want to get it fixed to be in original condition and working order.

Yep the switch is staying on even though the steering wheel is locked, and the radio isn't on and lights off...even the fan that stays on constantly isnt on but it's drawing power somehow to super heat the coil and drain the battery which btw is an 850 cranking amp brand new battery.
BillyBlaze is offline   Reply With Quote
Old 06-30-2009, 08:45 AM   #5
Jonboy
Slots go on anything!
 
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
Re: I need help, frying coils

You don't need a computer to run HEi. Just switched 12+.

The ignition switch isn't hard to change, down on the column. The only thing that makes me wonder is why power is going only to the coil, instead of everything. It seems like everything else would be on if it was a bad switch. Can you tell if the coil has been wired around the ignition switch? I am no electrical guru, so maybe someone can walk you through troubleshooting this.
Jonboy is offline   Reply With Quote
Old 06-30-2009, 09:24 AM   #6
manimal
Registered User
 
manimal's Avatar
 
Join Date: Oct 2006
Location: Southern Kalifornia
Posts: 3,066
Re: I need help, frying coils

If the key is hard to turn, the ignition switch is probably bad or the rod is bent. If it is staying on at all, it will draw power and burn up coils,points,etc....Good Luck
-Lance
__________________
------------------------------------------------------
-Lance
2000 Chevy C2500, 5.7, 4L80e
1999 Suburban K2500, 7.4, 4L80e
1980 Camaro..son's car...PROJECT
manimal is offline   Reply With Quote
Old 06-30-2009, 11:07 AM   #7
Pyrotechnic
Registered User
 
Pyrotechnic's Avatar
 
Join Date: Feb 2007
Location: Austin, TX
Posts: 3,930
Re: I need help, frying coils

Use a voltmeter on the + side of the coil to check for voltage after the key is turned off.
__________________
1977 GMC Sierra Grande
Pyrotechnic is offline   Reply With Quote
Old 07-01-2009, 06:51 AM   #8
BillyBlaze
Registered User
 
Join Date: Jun 2009
Location: Springtown,Tx.
Posts: 60
Re: I need help, frying coils

Quote:
Originally Posted by Pyrotechnic View Post
Use a voltmeter on the + side of the coil to check for voltage after the key is turned off.
OK, here's what happened...
on the aftermarket started the posts are closer together one of the leads wasn't tightened down enough and twisted to touch a post which caused the power to remain constant to the coil......fried the new and old coil.

replaced the coil after the fix and tested the coil on the + side with key off like Pyrotechnic said and now it's working fine.

Thanks guys!
Friday she goes in for the rebuild
BillyBlaze is offline   Reply With Quote
Reply

Bookmarks


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 08:01 PM.


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