Normal battery drain for '91 964?

[Hans57]

All,
I have a box '91 964 C2 cab that likes to use up the battery when not being driven. She is a garage queen in the Winter, and I just replaced the battery after it was tested bad.
I checked the parasitic load and it is running in the 90MA range, I pulled one fuse at a time and never saw that much of a drop, let alone a cumulitive drop any where near the total lead.
Where should I look next, or should I just use my new Ctek maintainer and forget it?


'91 C2 cab 47K miles box stock, near perfect condition. Garage queen.
'03 4X4 Tacoma daily driver 88K miles. Cannot break it.
'99 Altima. 145K miles. Yawn, boring car but it is the wife's and also cannot break it.
Formerly owned:
79 Scirocco
80 Rabbit Convertible
85 Jetta
91 Passat
95 Jetta GLX
91 BMW 318 IS
98 BMW 325 IS

Jeff New PCA menber.

[kurquhart]

First, there is a special procedure to use when disconnecting the battery before pulling fuses. I forget exactly what it is, but a search should reveal the details.

Even after that, though, I still could never figure out what was draining my battery. I put my car on a battery conditioner and have been happy with the results.

[jhubs]

I had the same problem develop in my 1987 911 over the winter. I could not find what was draining the battery and then I found a thread on the 911 tech forum that talked about the door switch that controls the interior cabin lights as being the usual culprit. I ordered a replacement switch from our host ($14) and replaced it (15 min.)...problem solved!
Jerry

[Tom W]

It's not always a fuse. In my case it was a relay.

[unclebilly]

Originally Posted by Tom W

It's not always a fuse. In my case it was a relay.

The right rear tire on my 964 went flat over the winter - do you think this was related to a fuse or a relay?