R57 Fuses always live 12v?
#1
#2
Welcome to newer vehicles..... You could have a relay or Field Effect transistor that is being kept alive by a body module until the body module goes to sleep [ industry talk for an ECU /Module finally shuts down after a nominal time spec, usually 15-20 minutes max.
You could have a Battery hardwire connection to the fusebox that is always hot, but is not USED in terms of consumed amerage downstream of the fuses by control modules unless they're awake, so no real drain on the battery to speak of[ 50 milliamp drain is usual industry standard that they shoot for with key OFF and all ECUs asleep].
That last paragraph is how most European vehicles that I see are set-up.
Battery Cable to any of the fuseboxes[ there are often 3 or more in the vehicle] and either no control of the fuse power out of the Fusebox to where it's routed, OR, there is a relay or Field Effect Transistor inside the fusebox that is controlled by which ever Module is designed to run it, giving power to the fuse only as designed by the engineers when they want it to power up a circuit.
Another way to look at it is that some Battery Hot fuses will feed the 'Memory' power to a Module, in tiny amounts of power even with your ignition key off, but once that module is awake and running, then it in turn controls many more fuses in the fusebox and your power consumption then goes up dramatically.
You could have a Battery hardwire connection to the fusebox that is always hot, but is not USED in terms of consumed amerage downstream of the fuses by control modules unless they're awake, so no real drain on the battery to speak of[ 50 milliamp drain is usual industry standard that they shoot for with key OFF and all ECUs asleep].
That last paragraph is how most European vehicles that I see are set-up.
Battery Cable to any of the fuseboxes[ there are often 3 or more in the vehicle] and either no control of the fuse power out of the Fusebox to where it's routed, OR, there is a relay or Field Effect Transistor inside the fusebox that is controlled by which ever Module is designed to run it, giving power to the fuse only as designed by the engineers when they want it to power up a circuit.
Another way to look at it is that some Battery Hot fuses will feed the 'Memory' power to a Module, in tiny amounts of power even with your ignition key off, but once that module is awake and running, then it in turn controls many more fuses in the fusebox and your power consumption then goes up dramatically.
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MiniPaws (03-05-2018)
#3
So, what do you think about the main 12v power outlet? Is there any chance that I'll be able to use that fuse? Or, should I just use one of the others in the "hope" that my dash cam won't drain the battery before it goes to sleepy time?
#4
#5
Thank you Pure Red, that's what I was afraid I was going to hear.
So, what do you think about the main 12v power outlet? Is there any chance that I'll be able to use that fuse? Or, should I just use one of the others in the "hope" that my dash cam won't drain the battery before it goes to sleepy time?
So, what do you think about the main 12v power outlet? Is there any chance that I'll be able to use that fuse? Or, should I just use one of the others in the "hope" that my dash cam won't drain the battery before it goes to sleepy time?
Give me your vehicle year and model and I'll try to look up the wiring diagram to find an Ignition Only fuse that would power down with the key off, allowing you to tap into it for your Dash Cam
#6
Here's the wiring diagram for R57: https://www.newtis.info/tisv2/a/en/r...s-cab/6qVQmvxB
Lighter is on F44 and there's a relay in the path, but I can't find what I01069 is connected to.
Edit — found it. I01069 is connected to the "Car access system":
https://www.newtis.info/tisv2/a/en/r...ronics/btYupoC
https://www.newtis.info/tisv2/a/en/r...s-cab/CkNG9jP0
https://www.newtis.info/tisv2/a/en/r...-s-cab/ZItKoZh
The function of the wire (from pin 8 on X10318) is not described, but I would infer that it has something to do with the car being turned on.
Last edited by rkw; 03-06-2018 at 12:53 PM.
#7
In 1st generation MINI, the lighter fuse is switched (tied to the ignition).
Here's the wiring diagram for R57: https://www.newtis.info/tisv2/a/en/r...s-cab/6qVQmvxB
Lighter is on F44 and there's a relay in the path, but I can't find what I01069 is connected to.
Here's the wiring diagram for R57: https://www.newtis.info/tisv2/a/en/r...s-cab/6qVQmvxB
Lighter is on F44 and there's a relay in the path, but I can't find what I01069 is connected to.
Update: Fuse 44 looks like it would work, but it's definitely too close to the cover to use the Add-a-Fuse. Is there any device that is similar but a lower profile? You can see how close it is to the top in the photo - 5th one down in the right most bank (20A)
Last edited by MiniPaws; 03-06-2018 at 02:39 PM.
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#9
Oh man, I'm getting in over my head LOL.. If Fuse 44 is the one I need, that might be a problem because it's very close to the fuse compartment cover and the piggy-back Add a Fuse might not fit.
Update: Fuse 44 looks like it would work, but it's definitely too close to the cover to use the Add-a-Fuse. Is there any device that is similar but a lower profile? You can see how close it is to the top in the photo - 5th one down in the right most bank (20A)
Update: Fuse 44 looks like it would work, but it's definitely too close to the cover to use the Add-a-Fuse. Is there any device that is similar but a lower profile? You can see how close it is to the top in the photo - 5th one down in the right most bank (20A)
https://www.rdforum.org/index.php?threads/21410/
Scroll down to find a brass strip from Advance Auto Parts - it looks like you could bend the connector down at 90degrees.
#10
Would this work?
https://www.rdforum.org/index.php?threads/21410/
Scroll down to find a brass strip from Advance Auto Parts - it looks like you could bend the connector down at 90degrees.
https://www.rdforum.org/index.php?threads/21410/
Scroll down to find a brass strip from Advance Auto Parts - it looks like you could bend the connector down at 90degrees.
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