Author Topic: Ballast resistor ohms  (Read 1270 times)

Offline Brewster_440

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Ballast resistor ohms
« on: February 28, 2010 - 12:36:08 AM »
I have a ballast resitor, two prongs. it measures 4.4 ohms. anyone know what the factory value is supposed to be?  just wondering...
1968 GTX 426 Hemi - gone
1967,65,72 Darts - gone
1970 Challenger - current project
First time behind the wheel of a car was in a 1973 Chrysler Town & Country w/440 on Daytona Beach




Offline UKcuda

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Re: Ballast resistor ohms
« Reply #1 on: February 28, 2010 - 04:14:55 AM »
I think the singles are one and a bit ohms and the extra one on the doubles is about 5 ohm.  I don't know any coil that would work properly with 4.4 ohms in the way.
'72 'cuda

Offline MEK-Dangerfield

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Re: Ballast resistor ohms
« Reply #2 on: February 28, 2010 - 04:19:01 AM »
4.4 ohms?   :22yikes:

The stock two prong resistors were 1.2 ohms. Aftermarket resistors will vary a bit.

Mike

1970 Challenger - SOLD
2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

Offline dodj

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Re: Ballast resistor ohms
« Reply #3 on: February 28, 2010 - 07:39:32 AM »
You might want to check your ohmmeter against a known resistance. Resistors usually short, or more commonly, open. I can't recall a resistor just increasing in value a couple ohms. :2cents:
Scott
1973 Challenger  440 4 spd 
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Offline MEK-Dangerfield

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Re: Ballast resistor ohms
« Reply #4 on: February 28, 2010 - 08:24:52 AM »
You might want to check your ohmmeter against a known resistance. Resistors usually short, or more commonly, open. I can't recall a resistor just increasing in value a couple ohms. :2cents:

It can happen. The resistor that was in my car when I first bought it measured 2.4 Ohms. The car wouldn't start when it got below 40* F because the spark was so weak. That problem took me a good while to figure out.   :banghead:

Mike

1970 Challenger - SOLD
2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

Offline Brewster_440

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Re: Ballast resistor ohms
« Reply #5 on: February 28, 2010 - 02:33:11 PM »
I checked the ballast resistor in my car (which works fine) and it measures 1.6 ohm.
don't know where this other resister came from (what car that is, we had a few) but the ceramic is moulded to have a mounting point. - so i looked on yearone.com and found this:
http://www.yearone.com/Serverfiles/part.asp?pid=P5206436&hid=127AG17795&cat=1&trk=12&searchid=3438031
« Last Edit: February 28, 2010 - 02:34:49 PM by Brewster_440 »
1968 GTX 426 Hemi - gone
1967,65,72 Darts - gone
1970 Challenger - current project
First time behind the wheel of a car was in a 1973 Chrysler Town & Country w/440 on Daytona Beach