Mallory Promaster Coil Test - Hot Rod Forum : Hotrodders Bulletin Board -- 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
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 11-09-2012, 11:49 AM
64Joker's Avatar
Last photo:
Join Date: Mar 2005
Location: Nor Cal.
Posts: 292
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Mallory Promaster Coil Test

Are the following resistance readings within the acceptable levels for a Mallory Promaster Coil Part # 29440:

Product Suggested Resistance:

Primary: 0.6 ohms
Secondary: 12.3K ohms

My Test Results using a voltage meter:

Primary: 0.4 ohms
Secondary: 11.95K ohms

Additional Notes: The coil and resistor/ballast are about 10 yrs. old.
Ignition: Mallory HEI

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 11-10-2012, 06:19 AM
Registered User
Last photo:
Join Date: Mar 2010
Location: georgia
Posts: 98
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 21 Posts
The only real way to test a coil is with an output test on an ignition analyzer. If 10% of the windings are shorted, the resistance change will be very small and difficult to read with an ohmeter, but the output can be down a lot.
Unless it's an open circuit or dead short, resistance readings don't tell you a whole lot.
Your readings are very close to what is specified, if your car is running okay then it's probably good.
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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
Mallory coil "start" wiring Q krehmkej Electrical 5 05-06-2011 05:06 PM
Ignition coil suspected of being to test it? Steve-0321 Electrical 1 10-15-2005 04:40 AM
Ignition coil suspected of being to test it? Steve-0321 Engine 3 10-15-2005 04:38 AM
Mallory coil vs. MSD Blaster 2 McDeuce Electrical 10 02-29-2004 07:57 PM
Mallory Promaster Coil w/ Standard Dist. kf6myv Engine 5 09-03-2003 09:57 AM

All times are GMT -6. The time now is 12:33 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.