Quote:
Originally Posted by hyde
Quote:
Originally Posted by eagle_bmw
I didn't say either circuit would be unprotected.
Let me try again. If the fuse-a-tap is oriented correctly both fuses will have a load relative to the equipment they are connected to.
Reversing the orientation will make the bottom fuse gets both loads. It probably won't matter if the total loads are small enough for the bottom fuse but orientation clearly has difference.
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Hi Eagle,
Could you tell me how to check the polarity using multimeter? I am not using add-a-fuse so it would be extremely important that I plug my fuse in correct orientation so the line is protected.
Thanks in advance. |
The fuse itself doesn't have polarity. It is just a metal wire so you can insert either way. Identifying the line side and the load side is pretty easy. I'd use a voltmeter set to measure DC voltage, remove the fuse and tap either side with the positive terminal with the black terminal connected to the car ground. If you can measure 12+V then that's the hot or line side. The load side without the fuse should be almost 0V. You would want to connect your dashcam to the load side.