bobgto65 wrote:What makes you think it is causing the battery drain?
Ever since I had the car, the battery would drain after no more than maybe 10 hours. I took it to an auto electrical specialist and he determined it was the radio. I had suspected the radio was the issue after reading around online but my tests were inconclusive. What I did (before taking car to specialist) was put a battery from another car in my Bonneville to see if that was the problem, but it still drained. I then put the battery on an external charger, disconnected the radio fuse in the Bonne, and reconnected the fully charged battery. It still drained, so I was stumped (which is why I took it to the specialist).
I didn't tell the specialist that I suspected the radio was an issue, so he began looking into the issue without any prior knowledge. Long story short, after about a month of him testing, what he did was disconnect the radio and the current battery, THEN he put a new battery in with the radio still disconnected. The car started every day for five days in his shop without problem before we deemed the battery drain issue solved. Remember, as I mentioned earlier, I left the radio (and fuse) in when I FIRST swapped the battery. According to him, the radio was still drawing power even after the RAP shut off and this damaged the battery to the point that it drained itself even without the radio fuse in. I didn't have the money to get a new battery for the Bonne, so I kept the old one in for the time being and just disconnected it every night. I was reading on here that the radio controls the amp and I was sitting in my car one day (while it was off and the old battery still connected) when I heard a small thump come from the trunk every 20-30 seconds. Sure enough it was the speakers making the noise further confirming that I had a defective radio.
Phew! So yeah, that's why I think the radio caused the battery drain.
I put a new battery in the Bonneville about 12 hours ago for the first time since getting it back from the specialist (with the radio disconnected) and it just started up fine. Assuming it starts up later this morning (which I'm sure it will...) I'll know (again) that I'm 100% done with the battery drain issue.
bobgto65 wrote:This circuit also controls the power windows and sunroof so if they still work with the key out and drivers door open, then the relay is stuck.
Unfortunately, I don't have the sunroof (which could be a blessing in disguise given the common issues with them) but the power windows don't work with the key out and driver's door open, so I'm all good from that standpoint.