1991 bonneville 3.8 coil module - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 04-05-2011, 09:55 AM
Registered User
 
Join Date: Apr 2011
Location: South Carolina
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
1991 bonneville 3.8 coil module

i have a 1991 bonneville 3.8 and the wiring harness sshows resistance in all the wires, but when its plugged up no fire is coming from the coil.What causes this.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-03-2011, 01:26 PM
sedan delivery's Avatar
Member
 
Last photo:
Join Date: Nov 2004
Location: davie, florida
Age: 72
Posts: 229
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
HERE ARE SOME POINTERS. HOPE IT HELPS
COIL TEST
Remove the ignition coil(s).

Using an ohmmeter, check the resistance between the primary terminals on the underside of the coil. The resistance should be 0.50-0.90 ohms.

Check the resistance between the secondary terminals. It should be 5,000-8,000 ohms.

If the coil failed either test, replace the coil.

THIS LINK WILL TEST THE MODULE
http://www.autozone.com/autozone/rep...96b43f8038fb5b

THIS LINK IS FOR THE CRANK SENSOR TEST
http://www.autozone.com/autozone/rep...96b43f8038fb48


THIS LINK IS FOR THE CAM SHAFT SENSOR TEST
http://www.autozone.com/autozone/rep...96b43f8038fb56
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-03-2011, 05:18 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,261
Wiki Edits: 0

Thanks: 215
Thanked 263 Times in 244 Posts
Quote:
Originally Posted by von239
i have a 1991 bonneville 3.8 and the wiring harness sshows resistance in all the wires, but when its plugged up no fire is coming from the coil.What causes this.
I would say most likely the crank sensor went out. The module can fail but there is 3 seperate curcuits to run the coils , it isnt as likely the module failed , but it could , more likely the crank sensor went out. The same with the coil, all 3 coils wouldnt go bad all at once,most of the time one coil goes bad( there are 3 seperate coils in the coil pack) and you will have a miss on one or two cylinders.

The crank sensor is the heartbeat of the system , without it, nobody goes to work. If your gonna throw a part at it , I would start there.
Or if you have a Oscilliscope you can check it all out.
This site may give you what you need, and I wont have to type so much

http://easyautodiagnostics.com/gm_ig...n_module_1.php
Its a little lengthy but it is good info.
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Testing HEI Coil/Module Sweet-34 Electrical 7 04-10-2011 04:21 PM
Hypothetical HEI Module/Coil Question Sweet-34 Electrical 2 02-11-2008 09:31 PM
holley control module no power to coil. chevelle4542speed Engine 0 05-09-2006 10:56 AM
Coil vs Ignition Module xxxxxxxxx1932Fun Electrical 8 07-23-2004 08:56 AM
Electronic Module or Coil. DTL504 Engine 4 04-20-2004 09:18 PM


All times are GMT -6. The time now is 03:28 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.