When you have intermittant working on working power tool & you measure a resistance instead of a beep sometimes, say it goes up to 120 ohms the down to 10 ohms. This is caused by the contacts going black you need to open the switch & clean the black marks off, probably cause by grease leaking onto the contacts in the first place & this should cure your faulty switch.
It's easy to replace but how do you troubleshoot it to see if it's what's broken with a multimeter
Place on meter and when pressing circuit is complete so you should see power.
When you have intermittant working on working power tool & you measure a resistance instead of a beep sometimes, say it goes up to 120 ohms the down to 10 ohms. This is caused by the contacts going black you need to open the switch & clean the black marks off, probably cause by grease leaking onto the contacts in the first place & this should cure your faulty switch.
So what is the actual wiring configuration