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mr400ex

2003 400ex Only Starts by Jumping Solenoid

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Hey everyone! Working on a 400ex for a friend of my mom's because it will only start when you jump the solenoid. I have pretty much gone through all the wiring from the battery up to the plug for the start button and nothing is broken or connected incorrectly. I tested the yellow/green and yellow/red wires that come from solenoid and they both read 0 volts as they should. The key switch reads 12v as I believe it should as well. What has me stumped is that the black wire that comes out of the start button assembly reads different voltage numbers, although I know it should be 12v. Is it the start button for sure or could something else be causing me to get that reading? Thanks and sorry for the long post

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could be dirty contacts inside the start button, some come apart some dont .... sand or use contact cleaner ... could also be a bad solenoid ....

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