Instrument cluster lights going out

[TXredfish]

I own a 2004 Newmar Scottsdale with W22 chassis.

About a year ago, the back lights on the instrument gauges went out when turning on the main night driving lights. The dealer replaced the dimmer switch. Right after I went on a trip, the back lights went out again. I found a blown fuse on the internal fuse block which was a 10A ILLUM. According to WH manual this is for Instrument Panal Cluster, Audio Alarm Body Builder Feed. A couple of weeks ago, the same problem occurred. I replaced the fuse. Then again yesterday, blown fuse again. I replaced the fuse, wiggled and checked wires wires around the fuse block, instrument cluster and dimmer switch. I left the lights on the cluster on with engine running for about 15 minutes and no blown fuse. It seems to be OK for now. Anyone else have this problem?
Anything I could check? Could have a bad instrument cluster? Also, I am not sure which audio alarm this fuse protects. Thanks ..........

[TXredfish]

I own a 2004 Newmar Scottsdale with W22 chassis.

About a year ago, the back lights on the instrument gauges went out when turning on the main night driving lights. The dealer replaced the dimmer switch. Right after I went on a trip, the back lights went out again. I found a blown fuse on the internal fuse block which was a 10A ILLUM. According to WH manual this is for Instrument Panal Cluster, Audio Alarm Body Builder Feed. A couple of weeks ago, the same problem occurred. I replaced the fuse. Then again yesterday, blown fuse again. I replaced the fuse, wiggled and checked wires wires around the fuse block, instrument cluster and dimmer switch. I left the lights on the cluster on with engine running for about 15 minutes and no blown fuse. It seems to be OK for now. Anyone else have this problem?
Anything I could check? Could have a bad instrument cluster? Also, I am not sure which audio alarm this fuse protects. Thanks ..........