Date: Tue, 12 Mar 2002 00:52:55 GMT From: "Duane Dostie" <ddostienopsamnline.net> Subject: Re: 93 900 turbo battery charge
The problem is you need to get above a certain RPM to initiate the charging system. Sounds like you don't drive it much and when you do the revs never get above 1500-2500RPM. Dude, it's a SAAB Turbo. DRIVE it! Beleieve me, it can handle it. If you're never reving the motor, then your alternator never knows it's supposed to charge the battery. Duane "Bill Jeffrey" <NOSPAMwjeffreynopsam.mit.edu> wrote in message news:3C8CD4AB.D66161DAnopsam.mit.edu... > Did anyone catch Car Talk last week? A lady called in to ask why the > battery on her 93 900 turbo convertible won't stay charged. It takes two > or three weeks for a freshly-charged battery to run down, but > eventually, it is so low that the starter will barely turn and the car > won't start. Charge it up and it is good for another few weeks, then the > same thing happens again. Her Saab dealer told her that the charging > system is fine, and she should replace the battery. The battery salesman > (Sears garage) told her that the old battery was still good, and the > problem is in the charging system. She bought a new battery anyway, but > it didn't help. Back to the Saab dealer, who insists the charging system > is fine, and refused to replace the alternator. And the problem keeps > happening. > > I have been fighting exactly this problem for at least three years on > this exact car (about 100K miles). Been through the new battery routine > with the battery salesman telling me the old battery is good. Replaced > it anyway, as she did. Been through the Saab dealer telling me the > alternator is fine. No one has any ideas, but the problem keeps > happening. As a result the car is so unreliable that my wife won't drive > it, and I am reluctant to. My jumper cables get more use than my > convertible top. > > Belt tension is fine. All electrical connections are clean. Battery > liquid level is correct, and doesn't seem to change. As I said, new > battery. I have been scrupulous about making sure that no lights are > left on when I shut it down - the three-position switches on the trunk > light and the "dome" light are invitations to disaster, of course. And I > replaced the brush pack in the alternator (brushes and voltage regulator > - OEM from Bosch). > > One possible clue - if I start the engine and let it idle, the battery > light does not go out. I have to kick the revs up high for a moment - > then the light goes out, and stays out when it returns to idle. Dealer > says this is normal, but I am skeptical. When the light is on, battery > voltage is low (about 12.0 v) as one would expect. When the light goes > out, battery voltage rises to 13.8-14.0, indicating that charging is > taking place. > > Any ideas? > > Bill Jeffrey > > ====================== > If "NOSPAM" appears in my return address, you must remove it after you hit REPLY.