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Old 01-27-2013, 01:10 PM   #48
Queen of Spades OP
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Joined: Mar 2009
Location: Decatur, GA
Oddometer: 978
Have multimeter and manual opened to section on testing ignition coil. Manual provides values for two resistance tests - blue/white to ground, and blue/white to plug wire.

At the top of the ignition coil test section the manual says that I need to "disconnect all wires" before using the ohmmeter to test for the given values.

The specified values KTM provides are
primary coil: blue/whiteground 0,425 – 0,575 Ω
secondary coil: blue/white ignition wire 10,80 – 16,20 k Ω
Below this table of values, the manual then says

"Before checking the ignition system check..." and goes on to list whether the ignition is on, the kill switch is on, the neutral light is on, motorcycle can be started with clutch in and that the battery is charged.

What is confusing to me is the seeming incongruence between the introductory paragraph, and the second paragraph. From reading other sites, resistance testing should be done with no voltage present. Is the KTM manual saying the same thing, but to first make sure these other things are OK -- before disconnecting everything?

Assuming I should have the battery disconnected, I'm showing "1. " on the multimeter readout on both tests, using the battery NEG as ground. If I tough the leads together I'm showing ~0.00. The MM is set to Ohms at 20k (the lowest value).

Please advise..
'99 KTM 640 LC4 Enduro (January 2014 snow ride)

Queen of Spades screwed with this post 01-27-2013 at 05:50 PM
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