03-26-2021, 07:41 AM | #23 | |
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I would use the ones recommended as they are most likely empty and if they aren’t then just use a tap anyways. |
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03-26-2021, 08:36 AM | #24 |
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Guys,
Been doing a bit of research before fitting my Blackvue. Been trying to find fuse locations to use for switched and constant power. Read most of the threads I can find here and yes, there are options for 'piggy backing' on existing fuses. But I got curious... like most cars, there are slots in each of my fuse boxes with no fuses. In my innocence I assumed that these empty slots would still be powered, even if that function wasn't used on my particular configuration. My thinking being if I can find a 'spare/empty' fuse location I can use a fuse tap to access power without impacting on any existing circuit load. I've probed around with a multi-meter and every empty fuse location I try is dead, I was expecting to find at least one permanent live in one of them. Am I missing something? I cant believe BMW install a bespoke wiring loom for each customer build on the production line. I would have thought the looms are all the same, every option catered for, and only enabled with control units and appropriate fuses. I'm confused.
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03-26-2021, 12:31 PM | #25 | |
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Also are you referring to the fuse block in the front or the back?
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03-26-2021, 12:52 PM | #26 | ||
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I confess I haven't been completely methodical yet. That comes next.
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03-26-2021, 04:53 PM | #27 |
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Stop complicating this guys, fuse f27 and f72 in the front fuse panel in the passenger kick panel have everything you need. In most cars these are empty. My radar and Blackvue are wired off these two. There is no reason to run wire all the way to the back when it’s right there. There is also a ground lug there as well.
You only have to remove 3 trim pieces and only one screw and it’s all right there. Pull up on the door sill trim with the logo in it. Then there is one screw for the piece in the corner. The screw will now be exposed after removing the door sill. Remove that and then that corner piece will pull out. The piece under the glove box has two twist retentions, and that whole piece comes down. Fuse box is up and to the right, it faces down towards the floor. Ground lug is just under carpet at bottom. |
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03-30-2021, 07:36 PM | #28 | |
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03-30-2021, 10:37 PM | #29 | |
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I will try to grab a picture of mine tomorrow. In my post way back I said which one was which for the fuses. |
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03-31-2021, 11:32 AM | #30 | |
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03-31-2021, 12:08 PM | #31 | ||
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If reversed then the original and the new fuses would be in series. The total loads will be the original + dashcam and it may potentially result to blowing either fuse.
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03-31-2021, 12:27 PM | #32 |
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If you do any research you will see a million responses saying it matters and some saying it doesn’t, up to you, if you are really worried about it take a multimeter and figure it out. YMMV.
The circuit isn’t connected without a fuse in the tap, so saying it’s not protected is incorrect. Do whatever you are comfortable with. Last edited by chrisnack; 03-31-2021 at 12:36 PM.. |
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03-31-2021, 02:20 PM | #33 |
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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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03-31-2021, 03:02 PM | #34 |
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Hi Chris, I didn't mean to challenge or offend you, and the reason I asked which direction you plugged it was because I am NOT using add-a-fuse, instead I am planning to plug fuse directly into empty slot, which means I would need to know the polarity for sure, otherwise the line to my dashcam is not protected.
It's basically like wrapping the cord in one of the fuse pins and that pin would need to be the correct side (load vs draw), if I "wrap" the wire on the wrong side, it's as good as wiring straight into battery, no fuse. :-/
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04-06-2021, 05:17 PM | #36 | |
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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.
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04-06-2021, 11:02 PM | #37 | ||
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04-06-2021, 11:06 PM | #38 | ||
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04-06-2021, 11:24 PM | #39 | |
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Perfect, Thank you! Will be trying this tomorrow. I can't believe how much harder they made it to reveal the fuse block completely, I pulled pretty hard on the floor liner and the trim, it wouldn't budge, I think I need a trim tool to remove the bottom side piece. Chris, thank you again, F72 is literally the only one exposed! And according to your earlier posts it is switched, so that's what I wanted.
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04-10-2021, 10:40 AM | #40 |
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I am trying to find a fuse which is switched during ignition, but when I try after all electronics turns off including ambient lighting and almost all fuses are still constant at 12V. I am not sure if everything has turned off completely yet. How to turn off the system completely to find a fuse which is off?
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04-10-2021, 11:38 AM | #41 | |
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F27 and F72 as stated many times in this thread are your friend. |
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04-10-2021, 11:58 AM | #42 |
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I am trying to find a fuse myself, but the fuses show 12V even after 15 mins and F27 seems to be larger fuse
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04-10-2021, 01:37 PM | #44 |
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Just wanted to thank everyone who has contributed to this thread. I've read it a few times recently and today I successfully installed my blackvue dr900x dual channel with cloud connection.
Threading the cables took a little perseverance but it wasn't difficult... Just eased some trim away and removed others as needed. I used the fuses recommended in this thread for permanent and switched live, they worked a charm. Even threading the cable into the tailgate was a breeze after watching the original video in this thread. I used a modified blendmount to attach the camera to the mirror. Blendmount don't make a RHD mount but the LHD one can be reconfigured with a little thought and works perfectly. So.... Once again... A big thank you to this thread.
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