Fuse 20 in the undershood fuse box was the powered spoiler fuse in 2005, I believe.
But that fuse differed from year to year and between Base/Limited. You can try 20, but I'd consult the card on the underside of the fuse box lid, it will tell you which one it is.
But keep in mind that ignoring this little symptom isn't really a good idea. The cause can be many things, and in some cases, the car's operation will eventually suffer due to what is going on.
- The spoiler acting odd is often a sign of a degrading battery.
- It can also be a sign of a dying alternator.
- An issue with the wheel speed sensors can cause this.
- In such cases, cruise control will not work or will act oddly.
- A deteriorating ground between chassis and engine block will cause odd troubles.
- It can be that the BCM is just confused.
- Try this:
- Shut engine off.
- Turn headlights on.
- Raise hood, disconnect battery.
- Wait 20 seconds or so.
- Reconnect battery.
- Turn headlights off and start engine; go for a drive and see if it behaves.
- You can also take the car to a dealer; this won't get the issue fixed, but it will cost you a lot of money and in some cases, you will get the car back with additional problems.