1950StangJump$
forum member
- Joined
- Apr 1, 2010
- Posts
- 966
- Reaction score
- 108
So, it amazes me that there are 12 years of threads on this topic and no definitive answer.
I finally got my car about where I want it, so circling around to some "minor" deals I had put off. Its a weekend driver -- I put maybe 4k miles per year on it. But, if I go more than 4-5 days without leaving it on a battery tender, it won't start. Very annoying.
The facts and my actions so far:
I finally got my car about where I want it, so circling around to some "minor" deals I had put off. Its a weekend driver -- I put maybe 4k miles per year on it. But, if I go more than 4-5 days without leaving it on a battery tender, it won't start. Very annoying.
The facts and my actions so far:
- I have a 2008 GT with a Kenne Bell. Originally a Shaker 500, but the head unit is now aftermarket.
- It has a relatively new (and high quality) battery that tests good.
- It has a new alternator -- the previous owner alleges it was one of the "high output" types. If so, I understand that they charge better at higher RPMs but worse at idle. Still, it shouldn't be the problem, and my Aeroforce gauge says the car is charging fine.
- When I put a voltmeter to the car battery after I had given it time to sleep, it showed a draw fluctuating between 70 and 100 milliamps. Roughly two or three times the acceptable draw, from my reading.
- Surprisingly, it is not the Shaker 500 amp. But, when I pulled fuse #67 at the Power Distribution Box, the draw dropped to 20-30 milliamps (acceptable)
- When I put the fuse back in at first, it would jump right back up to the 70-100. I thought I was on to something. As I removed the fuse and put it back in a few times trying to diagnose, the draw eventually dropped to 40 milliamps with the fuse in and stayed there. I don't know why the change, but 40 should be okay. It still dropped to 20-30 when I pulled the fuse.
- #67 says it is the #4 power to the SJB. I then pulled a bunch of the fuses in the SJB, but not all, before I got frustrated and quit. I was sure to pull the passive alarm fuse, the motion sensor fuse, the radio, etc. No change.