Hello Everyone!

For the past month, I have been having troubles with my fans not blowing when the RPMs are above idle.

I emailed M.B.DOC and he said that it is possible that my battery is simply overcharged. The overcharged battery sends too much power to the fan blower regulator, causing it to shut down. This kind of makes sense in my situation. Here are the facts that point toward this diagnosis:

- We replaced the battery in the car in December, and plugged it into a trickle charger for 30 hours so that the battery wouldn't die as I left my radio on (so that I could recode it). I could have overcharged the battery here.

- I test drove my parents car again. In their car, it is when the RPMs drop to idle (or near idle) the blowers start blowing. I had it so that if I popped it in Neutral (which causes the RPMs to go up for some reason) the fans would shut off. Put it in Park, RPMs lower a bit, fans turn on. And I could do this over and over. I'm not a mecanic, but faster RPMs probably cause the alternator to spin faster, thus generating more power.

- So, now to test the theory. I turned on anything electrical I could find . . . (heated seats, rear defrost, cabin lights, bright lights, stereo), and took the car for a test drive. The fans never quit working! They blew hard the entire test drive. It would appear that the theory is correct. By turning on these electrical components, the power would be divided among the components and thus, less power will be sent to the blower regulator, causing it to function normally. I then turned off all the electrical stuff, and after a bit of driving, the fans eventually shut off again while driving and the problem returned. It probably takes a little bit until the battery charges back up to it's overcharged state. This may be just a fluke, but I guess I'll have to find out.

- Now, I never experienced this problem in the winter (with the heat blowing). This could possibly be because, in the winter time, we almost always used the heated seats, which draws a lot of power from the battery.


Now, my question is this . . .

- How do I find out if my battery is overcharged?
- If my battery is overcharged, can it be fixed?

Thanks for the help guys!
Bryan