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Discussion Starter · #1 ·
when testing the ignition mod what kind of reading should i get on the ohm setting? also what is an acceptable ground when testing ? not sure im even on the right ohm setting.. 1990 fxst
 

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Ignition Coil Test

Test using a Multi-Meter:
Unplug the wires going to the coil and remove the spark plug caps.
Set the meter to Rx10:
Test the resistance of the primary windings - touch both meter leads to the terminals on the coil. The reading should be low (.5 - 1.5 Ohms) - just checking for any broken wires.
Set the meter to Rx10,000:
Test the secondary windings - touch one test lead to the spark plug wire (spark plug cap off) and the other lead to the (-) terminal on the coil. The readings should be high (6000 - 13000 Ohms).
Be sure to check your service manual for the specs to you your bike.

Test using no Multi-Meter:
Disconnect both spark plug wires from the spark plugs.
Unscrew either one of the spark plugs and stick it back into one of the wire caps.
Lay the plug down on the cylinder head or anything grounded.
With key on, run your starter for two seconds and look at the end of the plug: a nice, fat blue spark = healthy coil. A weak, sick-looking orange spark = dying coil.
 

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Registered
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75 Posts
Discussion Starter · #3 ·
Ignition Coil Test

Test using a Multi-Meter:
Unplug the wires going to the coil and remove the spark plug caps.
Set the meter to Rx10:
Test the resistance of the primary windings - touch both meter leads to the terminals on the coil. The reading should be low (.5 - 1.5 Ohms) - just checking for any broken wires.
Set the meter to Rx10,000:
Test the secondary windings - touch one test lead to the spark plug wire (spark plug cap off) and the other lead to the (-) terminal on the coil. The readings should be high (6000 - 13000 Ohms).
Be sure to check your service manual for the specs to you your bike.

Test using no Multi-Meter:
Disconnect both spark plug wires from the spark plugs.
Unscrew either one of the spark plugs and stick it back into one of the wire caps.
Lay the plug down on the cylinder head or anything grounded.
With key on, run your starter for two seconds and look at the end of the plug: a nice, fat blue spark = healthy coil. A weak, sick-looking orange spark = dying coil.
my meter dont have rx10 setting it has 2000k 200k 20k 2000 200
 
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