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Multi-meter test for ignition switch? #446435
08/22/09 07:42 PM
08/22/09 07:42 PM
Joined: Jan 2006
Posts: 957
Heart of Ohio
4boxers4 Offline OP
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4boxers4  Offline OP
super stock

Joined: Jan 2006
Posts: 957
Heart of Ohio
I am looking for a good piece of info on testing an ignition switch on my 71 Challenger, using a multi meter. Anyone have that specific information available, please? I am trying to confirm if everything is working correctly. Thanks!


Persistance is omnipotent Durability Engineer, Chair and Couch division...
Re: Multi-meter test for ignition switch? [Re: 4boxers4] #446436
08/23/09 12:25 AM
08/23/09 12:25 AM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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RapidRobert Offline
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Lincoln Nebraska
I'd start with checking the voltage drop between the "batt" and the "ign 1" terminals on the ign sw. Set your VOM to tenths of a volt & run it at a fast idle. What problems are you having?


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Re: Multi-meter test for ignition switch? [Re: RapidRobert] #446437
08/23/09 12:32 AM
08/23/09 12:32 AM
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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I agree with Robert.. The advantage of a voltage drop test is it shows you what the circut resistance is really doing to the available power.. Using a Ohm test passes such a minmal amount of current that a low ohm reading will make you think all is good when in reality that circut might not be able to pass the required amount of current due to high resistance & the voltage drop on an active circut would show that accurately by not passing full voltage through the component your testing...

Re: Multi-meter test for ignition switch? [Re: RapidRobert] #446438
08/23/09 10:29 AM
08/23/09 10:29 AM

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Quote:

I'd start with checking the voltage drop between the "batt" and the "ign 1" terminals on the ign sw. Set your VOM to tenths of a volt & run it at a fast idle. What problems are you having?




Why in F did my post get removed on this?

Last edited by 440sixpack; 08/23/09 10:30 AM.






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