If you do, HF's got 'em on sale for $2.49. It's an indispensable item for diagnosing those pesky wiring problems. I'm sure it's not super duper NASA approved accurate, but I'm also sure it's plenty close enough for our purposes. And hey - it's two dollars and forty-nine cents! Get 'em while they're hot.
![](http://images.harborfreight.com/hftweb/weblanding/redtagsale/images/90899.jpg)
This member is not affiliated with Harbor Freight - even if it seems like it sometimes
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![](http://images.harborfreight.com/hftweb/weblanding/redtagsale/images/90899.jpg)
This member is not affiliated with Harbor Freight - even if it seems like it sometimes
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