Please bear with me as electricity and even more so electronics are not my favourite cup of tea... I have two bulbs in my w202 c43 dash which are not working, so probably blown. I pulled the dash unit out of the console and removed the bulbs. I have a volt meter which measures the usual stuff and putting it at the lowest ohm setting (20 ohms) it reads zero on blown bulbs. A normal working bulb reads around 10ish ohms. Is this the correct way to check a blown bulb and normal readings?