Intermittent Battery Drain -- 88 5KQ

[syljay]

I had exactly the same problem, twice.

1. Radiator cooling fan runs intermittantly after shutdown.
Fix - replace the fan heat sensor located at top rear of Valve cover.

The fan would turn on in the middle of the night . .and run until the 
battery was completely drained and DEAD.
Luckily, I was putting out the garbage one night, and heard the fan go on.
Just pull one lead off this thermal switch when you shut off the 
ignition. If the problem disappears(no more dead batteries), you have 
found your culprit.


2. Interior lights dont go off after closing and locking the door 
(there is a 20 second delay).
Temp Fix - remove the interior lights, blue relay/control module from 
auxiliary relay panel.
You wont have any interior lights after you remove the relay (the 
manual on-off switch will still work). But, it will tell you if that 
was the problem.

In my case, I swapped out the blue module and still had the battery 
drain problem. I suspect a broken/intermittant "closed door" switch 
wire someplace is causing my problem. I havent pursued the issue 
further as removal of this blue colored module solved my immediate 
problem.

SJ in NJ

88 5kq
90 100q


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From: b1biker at aol.com
Subject: Intermittent Battery Drain -- 88 5KQ


Fellow listers --
I've been chasing an intermittent battery drain on this vehicle for 
more than a year. I've had it in the shop wtwice and still can't find 
the problem. There does not appear to be any rhyme or reason to this 
problem; the car may set for a wek and be fine, or as the current 
situation, it was driven on Tuesday and this afternoon the battery was 
so low that with the battery hooked up my 12A charger could not 
generate enough current to actuate the door locks or the dome light. 
I'm at a loss for how to find the source of this problem but until I 
do I have a hard time counting on this for my primary transportation 
and that's what it's soon to be. Any help will be greatly appreciated.
Gary Meier


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