Parasitic Draw is draining my battery. I found the circut, now what?

[DRIZCOL]

Hi,
I have been having an issue with my battery dying when I let my coupe sit for two or more days. I originally thought the battery was the problem since it was the original battery. I now realize that the battery was not the real reason the battery was not holding a charge. After doing some searching around on this site I found that others had a similar issue and called it a parasitic draw. The only way to diagnose the problem is to take a 10a volt meter and test the voltage being drained from the battery as it sits. This is a PITA job. With the volt meter being the connection between the battery neg and the neg cable in the engine bay you can get a reading from the volt meter. Mine is 5.4mah i believe which is draining the battery fairly quickly. With the volt meter connected I propped it up on my windshield and sat upside down in my driver seat and pulled one fuse at a time. Unfortunately the fuse for the problem was not coming from the fuses in the driver side panel. I then moved to the fuse box in the engine bay and finally found the circuit thats causeing the draw. When I pulled the "RADIO" fuse the reading on the volt meter dropped much lower. I also kept the fuse pulled for a few days just to make sure that the battery kept plenty of its charge.

The problem is that now that I know its the "radio" curcuit causing the problem I dont know what else I can do to trace what is failing on that circuit and causing a draw. Im a member of infinitihelp.com and was able to download the service manual but it looks like the electrical section ends at the navigation section. How can I find out everything on that circuit, or better yet trace the problem???

I know there are some wiring geniuses on this site that know where I can find the answers.

[DRIZCOL]

I have an 03 coupe it came with the bose system and no Navigation.

[pfarmer]

Originally Posted by DRIZCOL

I have an 03 coupe it came with the bose system and no Navigation.

Try disconnection the Bose amp when the car is left sitting. If this is your problem then either replace the amp or add a power on relay of the proper size to isolated the amp with the car shut off. It sounds like a known issue with the OEM sound system where either the Bose amp has an internal issue or the head unit is not properly handling the amp on line.