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How do I test a ballast resistor?
#2510823
06/20/18 02:17 PM
06/20/18 02:17 PM
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Joined: Jan 2012
Posts: 2,645
Stuttgart, Arkansas
rickseeman
OP
master
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OP
master
Joined: Jan 2012
Posts: 2,645
Stuttgart, Arkansas
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I have a buddy working on a 1968 Dodge pickup. He brought me the ballast resistor and asked if there is a way to test it. I told him I knew where there was a smart group of people to ask. Thanks
2011 Drag Pak Challenger
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Re: How do I test a ballast resistor?
[Re: rickseeman]
#2510827
06/20/18 02:19 PM
06/20/18 02:19 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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They can measure fine cold and fail hot
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: How do I test a ballast resistor?
[Re: rickseeman]
#2510898
06/20/18 04:46 PM
06/20/18 04:46 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Rick did he mention a specific issue? My last point ballast measured 1.6 ohms cold
live every 24 hour block of time like it's your last day on earth
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Re: How do I test a ballast resistor?
[Re: rickseeman]
#2510903
06/20/18 04:52 PM
06/20/18 04:52 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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The 68 FSM shows 0.5-.06 ohms for all applications listed.
Assuming it's still a stock 68 ignition system.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: How do I test a ballast resistor?
[Re: RapidRobert]
#2510920
06/20/18 05:37 PM
06/20/18 05:37 PM
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Joined: Jan 2012
Posts: 2,645
Stuttgart, Arkansas
rickseeman
OP
master
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OP
master
Joined: Jan 2012
Posts: 2,645
Stuttgart, Arkansas
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Rick did he mention a specific issue? My last point ballast measured 1.6 ohms cold He said it wouldn't start and thought it was an ignition issue. I told him I didn't think it was because of the ballast resistor. (Even though I've forgotten what it does exactly.)
2011 Drag Pak Challenger
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Re: How do I test a ballast resistor?
[Re: rickseeman]
#2510930
06/20/18 05:51 PM
06/20/18 05:51 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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The ballast should be bypassed when in start.
It is only used in run.
Did he check to see if the coil had any voltage in start?
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: How do I test a ballast resistor?
[Re: rickseeman]
#2511364
06/21/18 03:37 PM
06/21/18 03:37 PM
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Joined: Dec 2003
Posts: 22,696
Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,696
Bitopia
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Weigh it? Sorry, I couldn't resist. 
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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It will change under a load so it will read with more voltage when under a load cold than it will when it warms up, it doesn't take long for them to heat up