Multimeter Coil Test

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GreyImport
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Multimeter Coil Test

Postby GreyImport » Mon Dec 02, 2013 2:41 am

So Im trying to troubleshoot a problem and tried to test my coils ... in fact all 4 coils I have.

Now the primary should read around 2.8 ohms

And the secondary should be around 15K ohms

All mine read primary 1.0 and secondary = no reading.

Can anyone explain that? .... am I missing something?

The 2 on the bike are producing a nice healthy blue spark


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1990 FZR250R 3LN1
1977 Triumph Bonneville 750 T140V
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Re: Multimeter Coil Test

Postby reelrazor » Mon Dec 02, 2013 5:55 pm

Yeah, you are doing the testing wrong.

Explain your procedure
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GreyImport
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Re: Multimeter Coil Test

Postby GreyImport » Mon Dec 02, 2013 6:14 pm

Primary : multimeter on 200m (ohm side)
probes on + and - terminals of coil (or into the disconnected plug for the ones on the bike)

Secondary : multimeter on 20K (ohm side)
probe on + terminal and other in the end of plug lead.
1990 FZR250R 3LN1
1977 Triumph Bonneville 750 T140V
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http://2fiftycc.com/index.php
EMAIL: greyimport@2fiftycc.com

LiteTek Carburettor Seal Kits
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DonTZ125
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Re: Multimeter Coil Test

Postby DonTZ125 » Mon Dec 02, 2013 7:36 pm

The secondary windings are isolated from the primaries. These are double-ended coils, so measure the resistance through both spark wires (without the caps).

The primary measurement sounds low, but not impossible. It may be your ohmmeter is out of its comfort zone ...

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GreyImport
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Re: Multimeter Coil Test

Postby GreyImport » Mon Dec 02, 2013 8:15 pm

thanks guys

Now reading 14.8 and 15.2 on the secondarys
1990 FZR250R 3LN1
1977 Triumph Bonneville 750 T140V
Image

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http://2fiftycc.com/index.php
EMAIL: greyimport@2fiftycc.com

LiteTek Carburettor Seal Kits
http://www.litetek.co/index.html


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