(R7) Do I Really Need a Fuse for a Powered Mirror Wire Tap?

tgray

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Today I installed one of those Radar Mount RJ11 Mirror Wire Radar Detector Hardwire Power Cords I bought off Amazon. While I was waiting a day for it to arrive, I created my own similar tap minus the built in fuse the purchased one had. My question is, do I really need the fuse? I could use the one I made in my wife's vehicle, or I could just purchase a new one and have it arrive this weekend. I am just curious if the additional fuse is worth it.
 

NVR2FST

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Kinda reminds me of the joke about the "tenderfoot" who went to a supply store in St. Louis, Missouri, "The Gateway To the West", to get outfitted for his westward adventures in the mid Eighteenth century.

After purchasing clothes, rope, a tent and tent pole, a canteen, backpack, etc., he asked the old store keeper if he would need a gun.

"Well, mebbe ya will an' mebbe ya won't. But if ya do, you'll need it REAL BAD!"
 

lastdeadmouse

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Today I installed one of those Radar Mount RJ11 Mirror Wire Radar Detector Hardwire Power Cords I bought off Amazon. While I was waiting a day for it to arrive, I created my own similar tap minus the built in fuse the purchased one had. My question is, do I really need the fuse? I could use the one I made in my wife's vehicle, or I could just purchase a new one and have it arrive this weekend. I am just curious if the additional fuse is worth it.
The fuse that the rvm itself is on will provide plenty of protection.
 
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dereileak

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If the radar detector over draws what the wire can provide, the fuse in the fuse box will pop and stop damage to the wire. You should be fine, the only reason you would need a fuse in the mirror tap is if the wire is thinner then the wire that goes to the mirror, you always fuse to the smallest wire in the circuit, because If you don’t and the wire shorts then you will melt the wire instead of blowing the fuse. I have a hard time believing the wire in the mirror tap is thinner then the supplied wire which is already tiny, probably only fused at 5 amps to begin with
 

doubledge

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No problem. Just remember to pay it forward when you have the chance. Good luck!
 

dyn0mitemat

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The extra fuse absolutely won't hurt, but as dereileak mentioned, the taps you buy most likely have them in case their wire is thinner than what the car has to the mirror (and what it's fused at).
 

wirelessandy

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My two cents:

When in doubt and if you have the means to add one, then ... add fuse. Cheap insurance.

Otherwise, your R7 will be happy to volunteer itself as a fuse whether you like it or not.
 

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