Distributor Coil Test

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Model T Ford Forum: Forum 2013: Distributor Coil Test
Top of pagePrevious messageNext messageBottom of page Link to this message  By Dave Barker on Sunday, June 02, 2013 - 03:19 pm:

I have an old Bendix coil that my father had put in my Speedster in the 50s, and it ran on it with a Delco distributor for years. I've cleaned-up the coil, and would like to test it to make sure it's usable. The car is 6v, negative ground, no mag, no starter. Just the battery, dizzy, and coil. Any advice on testing it? I've checked resistance, and got 0.50 ohms across the positive and negative posts, but needle only moved slightly (when in (RX10,000) when checking across the center and a post. Thanks for the help.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dave Barker on Monday, June 03, 2013 - 10:36 pm:

I took my coil to a local auto parts store, and they used a better meter than mine and got 1.5 ohms across the positive and negative posts. Can anyone tell me if there would be a problem with this, or any further testing that I can do? Thanks for any advice.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jerry VanOoteghem on Tuesday, June 04, 2013 - 01:53 pm:

Dave,

Just hook it up and try to use it. It's as easy as any other test that you can do.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ted Dumas on Tuesday, June 04, 2013 - 08:08 pm:

I vote with Jerry.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ken Kopsky, Lytle TX on Tuesday, June 04, 2013 - 08:29 pm:

The measurement between the +/- posts will give the Primary resistance. Measuring between the Negative post and the center post will give you the secondary resistance. If you get a reading on both, the coil MAY be good. A lot of these coils will fail when they get hot so a continuity or resistance check on the bench is never the final word.

Run it...And carry a spare. :-)


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dave Barker on Tuesday, June 04, 2013 - 09:54 pm:

Thanks. As I noted, the needle jumped a little when I measured across the negative and center posts. I'll put it in and give her a shot when I get it all back together. Just didn't want to mount it on the firewall if it's not usable. Thanks again.


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