#1: F4 fuse Author: runor, Posted: Sun Feb 28, 2016 8:45 am ---- Hi!
I've got a parasitic battery drain, but when i pull out the F4 fuse it stops. My fuse box looks like this:
. If i disconnect the radio, the display and the boot lights it still drains the battery. What else could be?
#2: Re: F4 fuse Author: macca1411, Location: Westhoughton, LancashirePosted: Mon Feb 29, 2016 4:30 am ---- Is that the engine fuse box or passenger compartment fusebox?
Is the car pre-plexed or multi-plexed?
More details about the car needed. Year? Engine? Transmission? Modifications?
Have you messed about with anything electrical recently?
#3: Re: F4 fuse Author: runor, Posted: Mon Feb 29, 2016 6:14 am ---- Passenger compartment fusebox, it's a multi-plexed car from 2002, 1.4 petrol engine, manual transmission, the previous owner has installed a sound system, but now is just the basic system.
#4: Re: F4 fuse Author: Timon2210, Location: PalestinePosted: Tue Mar 01, 2016 9:12 am ---- You need to check if there is any cut wires that drain the battery by touching the car body something else,also maybe your head unit have something wrong inside which drain your battery
#5: Re: F4 fuse Author: runor, Posted: Tue Mar 01, 2016 9:26 am ---- The head unit can't be the problem because if i pull out the fuse from it, the drain still exists. Something on the F4 fuses circuit causes the drain.
#6: Re: F4 fuse Author: Timon2210, Location: PalestinePosted: Tue Mar 01, 2016 9:38 am ---- The F4 fuse control the following:
1-Multifunction Display
2-Navigation Control Unit
3-Boot Lighting
4-Audi Equipment.
So I suspect that you have a problem with the Boot Lighting,as you might have it on all the time,if it's switch is not working,take a look from the back seat while the boot is closed.
Do you have the ECO Mode working in your car or not?
#7: Re: F4 fuse Author: runor, Posted: Tue Mar 01, 2016 9:43 am ---- The boot lightning is off, I even tried pulling out the bulb, but it's the same.
I measuring the amperage when the key is off, so ECO is not really working.
#8: Re: F4 fuse Author: macca1411, Location: Westhoughton, LancashirePosted: Tue Mar 01, 2016 9:46 am ---- Is it possible that when the after market radio was replaced with the OEM one that the red and yellow wires weren't reversed again?
#9: Re: F4 fuse Author: Timon2210, Location: PalestinePosted: Tue Mar 01, 2016 9:46 am ---- The ECO mode works after you keep the audio running for a while with the engine off,or keep the doors open,etc.. so if it's not working you can activate it using PP2000,but it worth taking the head unit out ,and check all the wiring harness in the back,since the ex-owner had sound system installed.
#10: Re: F4 fuse Author: runor, Posted: Tue Mar 01, 2016 9:58 am ---- The problem is that it drains the battery when the car is idle (doors locked, everything is off). I disconnected the head unit, but it uses only 10 mAmps, which is nothing serious.
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. If i disconnect the radio, the display and the boot lights it still drains the battery. What else could be?
