I have a 99 35th anniversary mustang. I have recently come into a problem with the battery going dead after about 3 days of not driving it. I have put a tester in line with the neg cable removed from the battery and saw there was a high reading with it being disconnected.

I traced it to the number 27 fuse in the fuse block under the dash. I pull this fuse and the volt meter drops to almost nothing. I then have removed the radio, cd player and both the cig lighter and the power outlet. I put the fuse back in and the volt meter goes back to what it was and shows something is drawing power.

According to the fuse panel diagram I found the number 27 fuse is for radio only. Im at a loss can anyone help me or point me in a direction to get some answers?  

Fuse 27 powers the left and right rear speaker sub amps and the main amp as well (wire is violet and light blue stripe). One of your amps might have an internal short. Try unplugging the amps to see if the power drain goes away...

BTW, cigar lighter is on its own fuse, so that's not it...

HTH...
Mark  

Thanks for the info I will try that...this is getting bad every 3 days the system has drianed the battery to nothing. Went back and checked the draw with amp meter and with neg disconnected im showing 12.5 draw while being in that state.... but thanks anways. Think I will scrape the whole Mach 460 stereo system.