Tip & How-To about Motorcycles
To test a twin ignition coil on a motorcycle you will need a pocket multimeter.
With the meter set to kilo-ohms(1000 ohms) scale,place one test lead into one spark plug cap & the other test lead into the other plug cap.(this is called the ignition coil secondary resistance) The reading should be around 20-40kilo ohms.
If a high reading exists check again with spark plug caps removed(they un screw from the lead) then check caps seperate. Caps typically read 5 to 10 kilo-ohms.
A faulty plug cap is not as un-common as you might think.
To test ignition coil primary resistance set the meter to ohms(lowest scale) Place one meter test lead to the small wire going into the coil & the other test lead onto the coils body(where its metal) The reading should be only 2 to 5 ohms.
Posted by Andrew... on
Jun 28, 2012 | Harley Davidson Motorcycles
May 31, 2012 | 2003 Harley Davidson FLSTC Heritage...
Aug 25, 2011 | 2005 Harley Davidson XL 1200 C Sportster...
May 11, 2011 | 1981 Honda GL 1100 Innerstate Gold Wing
Jan 28, 2010 | 1987 kawasaki GPX 750 R
782 people viewed this tip
Usually answered in minutes!