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      10-28-2020, 09:37 AM   #1
dtox9
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20A fuse tap for cellink dashcam battery

I've seen multiple posts talking about which fuses to tap for the newer G01 X3's for various projects... It appears as though the fuse boxes are different for the F25 vs the G01 (I think). I haven't found any specific posts about my needs for the older F25.

I'll be installing my Viofo A129 Plus Duo dashcam setup soon... and have included the Cellink Neo battery pack so I can use the parking monitoring without aggravating the car's computer or battery.

I need a 15a or 20a 'switched' ACC fuse to tap in order to provide the 9A power to the battery pack when the ignition is on. Preferably not one shared with a super-critical component of operation for the vehicle.

I'm hoping to make all the connections in the back... but will use the passenger footwell if I have to.

Anybody know which fuse this would be?

Also, are there ANY fuses that are instant-off when the ignition turns off? or do ALL of the ACC fuses remain on for 5-6-7 minutes after shutdown?
I can't imagine ALL of them are delayed shutoff?

Last edited by dtox9; 10-29-2020 at 03:51 PM..
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      10-30-2020, 01:59 PM   #2
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As long as I can get the wires to reach the rear panel safely... I'm planning on tapping one of the 20A fuses labeled for the heated seats. I'm pretty sure these are switched ACC fuses and not always HOT... (won't know until I can get back there with a tester)

I'm hoping they power down immediately, as opposed to a delay.

I haven't been able to find ANY information anywhere regarding which fuses may be immediate shut off when the ignition turns off - verses the delayed shut down over a few minutes after leaving the vehicle ?!?
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      11-02-2020, 08:27 AM   #3
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OK - so for anyone who may be interested now or in the future...
I found four 20A fuses for the heated seats in the rear fuse panel.
186 - 189 / all of them retained power after the initial ignition shut off.
(I assume they power down after 5-6-7 minutes / I haven't checked that yet)

So I found two new fuses that drop power Immediately with the ignition shut-off.
Smaller mini fuses near the top of the panel...
131 and 132

These fuses according to the fuse card are labeled "engine".

Anybody know what they are connected to?

I'm hesitant to tap anything related to the engine on this type of vehicle.
I've confirmed NONE of the other fuses in the rear panel drop power instantly.
(sigh)

I may have to consider mounting the cellink neo battery up front ?!?
(if I can find a 20A up there that doesn't delay shut-down)
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      11-16-2020, 09:53 AM   #4
dtox9
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Well, this turned out to be my own personal thread I guess....

Just for archive sake, for anyone happening to be searching in the future...

I gave up on ANY fuse in the rear panel instantly shutting off, other than those labeled for critical components I wished not to tamper with.

I ended up using fuse 189 for the heated seats.
It's a large standard size 20A fuse, and I used a fuse tap adding a 15A line to the Cellink Neo battery installed in the floor compartment right in front of the fuse box.

This supplies 9A power feed to the battery while the ignition is on... and shuts down power after the BMW electrical systems shuts down after the car gets turned off.

The battery provides power to the dual camera system while parked for continuous recording. No errors, no messages, no issues, no vehicle battery drain.

Works like a charm (with a few minutes shut down delay).
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      11-17-2020, 10:16 AM   #5
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Photo of the fuse tap... and cable route...
I covered the hot lead with some split loom and tape to protect it from friction over time.

The cable is blocking the view actually, of where I placed the ground.
I used a self tapping screw and mounted the ground right below the fuse panel on the upright support.
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