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Date: Thu, 28 Oct 2004 17:13:07 -0500
From: Captain Freedom <>
Subject: Re: 89 900T Battery drain problems

SBN wrote: > I have an 89 900T Convt. For over a year and a half I have had a > horrible battery drain problem. For a while I used a battery cut-off > switch to some success, but then that did not even work, as while I was > driving the battery was not get re-charged. I brought the car into the > shop this summer and they replaced a cable from the alternator to the > block (ground wire). That seemed to do the trick for a while. But now I > am back to square one. Battery and alternator have tested fine. Now I > have 2 problems that might be related. > 1.) Power window switch. Constantly have to clean the contacts. Window > switches constantly need to be switched from one cable to another to > lower/raise window. At times the windows will not function until I > switch it to different switches. > 2.) Heater blower fuse constantly blows. Almost every other day the fuse > is blown at some point. > > Now here is my question. First how much do people think the heater > blower fuse-blowing could be the culprit? > > Second. To try and narrow down the source of the power leak, will > disconnecting the fuses help? I was thinking that each night I could > remove all fuses. Then next day put them in. Then I would each night > leave one fuse in. If over time that selected fuse doesnt seem to be a > source of the problem I could move to adding more fuses each night that > I wouldn't pull. > Get an ammeter and hook it up to the battery. Check for current draw. If there is current draw then pull fuses one at a time until you find circuit that is causing the draw. Wiring diagram might come in helpful at this point. John

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