Slant Six Forum,  Forum Index
Slant Six Forum,  Forum Index
Slant Six Forum,  Forum Index
Home Slant Six Forum,  Forum Index Log in Register FAQ Memberlist Search

Please consider a donation to the site for Claude's Valiant Effort.

how do I test a ballast resistor?

 
Post new topic   Reply to topic    Slant Six Forum, Forum Index -> Engine
Select message display options:             View previous topic :: View next topic  
Author Message
oldnslo
4 BBL ''Hyper-Pak''


Joined: 20 Jan 2013
Posts: 49
Location: CT

Post subject: how do I test a ballast resistor? (Sat Mar 16, 2013 2:26 pm) Reply with quote

OK...it's first time the car hasn't started since I got it on the road. I've been driving it frequently without any real issues. Now no spark. How do I test a ballast resitor? Also, I have a pertronix ignitor, how do I test that?


Back to top
View user's profile Send private message
Junior
Turbo Slant 6


Joined: 27 Apr 2007
Posts: 636

Post subject: (Sat Mar 16, 2013 4:38 pm) Reply with quote

i dont know about the pertronix but the ballast is easy. with the lead plugged in unplug the side going to your coil. with the key on you should have 12v going in and 9v coming out.



_________________
1966 Plymouth Valiant, 225, 3 on the tree, 8 1/4 3.21 sure grip, hyperpac, holley 650dp, turbo
Back to top
View user's profile Send private message
Joshua Skinner
Supercharged


Joined: 27 Jan 2005
Posts: 6943
Location: Portland, Oregon

Post subject: (Sat Mar 16, 2013 5:17 pm) Reply with quote

An ohm meter is the only positive test. I can tell you why a voltage test may give you erroneous readings, but to do so at the keyboard is more than I want to get into when it's time for me to make dinner.

Disconnect at least one terminal and measure the resistance. It should be around 2 ohms give or take. Usually they fail open which on a digital meter is usually displayed as OL (overload or over limit) which means it's beyond the capability of the meter. Shorted is not good, but also near impossible to achieve.



_________________
Joshua Skinner
Car nut, telecom tech, tool using mammal
Back to top
View user's profile Send private message
jhdeval
EFI Slant 6


Joined: 09 Sep 2012
Posts: 421
Location: Carrollton, GA

Post subject: (Sat Mar 16, 2013 9:22 pm) Reply with quote

To test your ballast resistor you need an ohm meter or multimeter set to ohms as previously suggested but you really need to remove the connectors from both sides of the resistor. I believe single should read 1.8 ohms and dual should read 1.8 and 5 ohms. You should be getting 9 volts to the positive side of the coil. Also check the negative side I believe it should be 9 volts. If there is voltage to all those spots then you have eliminated the ballast and coil. That basically leaves the Pertronix.

I had a similar issue occur when I was using the Pertronix II. It worked well but one day just stopped. It was the Pertronix.

If it turns out to be the Pertronix I would recommend pulling it out an replacing with a standard Mopar Electronic ignition setup or hei. That way if there is a problem you can run to any parts store and replace the part rather then possibly be stranded.



_________________
2006 Jeep Commander
2013 Chrysler 200

1964 Valiant 4 Door
1965 Plymouth Barracuda
1967 Chevy Camaro
Back to top
View user's profile Send private message
oldnslo
4 BBL ''Hyper-Pak''


Joined: 20 Jan 2013
Posts: 49
Location: CT

Post subject: (Fri Mar 22, 2013 10:24 am) Reply with quote

Well, I put the points back in. The car runs. I guess it was the Pertronix. Now I have to follow through with them. The unit is only 10 months old.


Back to top
View user's profile Send private message
emsvitil
Supercharged


Joined: 12 May 2005
Posts: 5099
Location: So California

Post subject: (Fri Mar 22, 2013 12:33 pm) Reply with quote

Was the pertronix hooked up before or after the ballast resistor?

Sometimes they don't work after the ballast resistor because there isn't enough voltage.



_________________
Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes
Back to top
View user's profile Send private message Visit poster's website
oldnslo
4 BBL ''Hyper-Pak''


Joined: 20 Jan 2013
Posts: 49
Location: CT

Post subject: (Sat Mar 23, 2013 3:19 am) Reply with quote

After ballast resistor, as per instructions. It was the Ignitor, not II or III. The car ran great, until it just didn't run at all. Makes me reconsider using another Pertronix...


Back to top
View user's profile Send private message
phogroian
EFI Slant 6


Joined: 14 Mar 2004
Posts: 333
Location: Falls Church, VA

Post subject: (Sat Mar 23, 2013 7:21 am) Reply with quote

Even the standard issue Pertronix should work without the ballast if you are using the stock 3 ohm coil... keep the ballast resistor if you put in the "flame thrower" 1.5 ohm coil.



_________________
Never seen a Valiant I didn't like!
Back to top
View user's profile Send private message
jhdeval
EFI Slant 6


Joined: 09 Sep 2012
Posts: 421
Location: Carrollton, GA

Post subject: (Sat Mar 23, 2013 11:28 am) Reply with quote

Not sure if I was clear on my opinion of Pertronix but I would not recommend it. Really easy points to electronic ignition till it goes out then you are out.



_________________
2006 Jeep Commander
2013 Chrysler 200

1964 Valiant 4 Door
1965 Plymouth Barracuda
1967 Chevy Camaro
Back to top
View user's profile Send private message
64ragtop
EFI Slant 6


Joined: 06 Feb 2005
Posts: 467
Location: South Austin, Texas

Post subject: (Sun Mar 24, 2013 8:45 pm) Reply with quote

oldnslo wrote:
After ballast resistor, as per instructions. It was the Ignitor, not II or III. The car ran great, until it just didn't run at all. Makes me reconsider using another Pertronix...


Somehow, "reconsider" just doesn't convey the strength of your feelings... Laughing Laughing

BC



_________________
'64 Dart GT convertible, 64 Dart 170 2-door post sedan in faded blue and rust (the Az Dart) & a sixty THREE Dart 170 2-door post sedan in faded blue and rust. (future project)
Early Dart Disorder (EDD) is real, and I've got it!
Back to top
View user's profile Send private message
phogroian
EFI Slant 6


Joined: 14 Mar 2004
Posts: 333
Location: Falls Church, VA

Post subject: (Tue Mar 26, 2013 2:10 pm) Reply with quote

I haven't had any problems with the Pertronix ignitor 1 that I put in my '65 Valiant three years ago. I keep the points and condenser in the trunk, in the event of a problem.

I also keep a spare Chrylser electronic ignition module in the trunk of my '75 Dart for the same reason. I've had a few of those fail over the years.

Absolutely, oldnslo you should contact Pertronix and see if they will send you a replacement. They'd be smart if they do... the good reputation that a positive outcome in this case would bring would be worth more than the cost of the unit for Pertronix.



_________________
Never seen a Valiant I didn't like!
Back to top
View user's profile Send private message
oldnslo
4 BBL ''Hyper-Pak''


Joined: 20 Jan 2013
Posts: 49
Location: CT

Post subject: (Sun Mar 31, 2013 5:19 am) Reply with quote

The unit was only 10 months old. I called the tech line and they emailed me on how to test. It failed. I sent it back under warranty. Being as I will be getting another unit, not a refund, I am most likely going to try it again. Otherwise I'll just be kissing my money goodbye. BUT...I plan to keep my distributor with the points adjusted and ready to go in the trunk!


Back to top
View user's profile Send private message
oldnslo
4 BBL ''Hyper-Pak''


Joined: 20 Jan 2013
Posts: 49
Location: CT

Post subject: (Wed Apr 10, 2013 7:01 pm) Reply with quote

Well, the new Ignitor came today...let's try this again.


Back to top
View user's profile Send private message
Select message display options:   
Post new topic   Reply to topic    Slant Six Forum, Forum Index -> Engine All times are GMT - 7 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Please consider a donation to the site for Claude's Valiant Effort.

Go To Slant Six Forum Home

Mopar Ring Member Site
Mopar Ring Member Site



Powered by phpBB © 2001, 2005 phpBB Group
Theme created by Vjacheslav Trushkin, modified by Chuck Rivers