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I am installing a dash cam in my 2011 Ford fusion and hardwiring it to my fuse box. in the instructions it says it must be connected to a constant fuse and a switched fuse.

I have a test light and when the car is off and the key is out of the ignition some of the fuses light up as they are constant. when I put the key into the ignition and turn it to the on position, none of the fuses light up at all. Even the constant fuses that I tested earlier do not light up.

Am I doing something wrong here?

DavidRecallsMonica
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1 Answers1

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It sounds to me like you have connected one end of your test light to the positive side of the battery rather than the negative. This would give the results you are experiencing.

I believe that this is what @solarMike is also suggesting in the comments.

HandyHowie
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