Fuse keeps blowing? Troubleshooting guide

Hello,

"In my Audi A4 TDI/AFN, the 10A fuse for the interior light and turn signal control for the central locking system keeps blowing repeatedly (after about 1-3 days)."
What could be the reason? Thank you in advance!

Currents greater than 10 Amperes?

SCNR

Have you ever measured with an ammeter in different states?

e.g., interior lights turn on AND the central locking system unlocks AND the hazard lights turn on.

That would be 4 times 21W turn signals, and 20W for the interior lights, which roughly totals 104W.

There are still 16 weeks left for the project.

The 120 watts of the 10A fuse quickly reach its limit.

Is 10A actually the correct size?

According to the Audi manual, it is indeed the correct fuse.

If your A4 is a bit older, you could compare it to my A6, which doesn't have turn signal control but does have the interior light package, and it's protected by a 15A fuse. A friend who has the same car and retrofitted a wireless central locking system had to increase it to 20A because he had to replace the 15A fuse frequently (probably due to the turn signal control .
As I mentioned, I have a 15A fuse installed in my car, but it's an A6 C4.
Best regards,
Martin

I've now installed a 15 amp fuse.
But the problem still exists.
I suspect there might be a broken cable near the passenger door.