Date: Sat, 27 Dec 1997 11:44:30 +0800
From: Tee Mai Wah <maiwah_at_pc.jaring.my>
Subject: power window
Here's an attachment where you could put up on your page.
It's a wiring diagram for the power windows to work when you
open your doors, even if your ignition is off!
It's actually a standard feature of the e30 that I found out
just thought of sharing the knowledge with all enthuthiast
Power window relay circuit for E30.
_at_ _at_ 1
[---#----] \ 1
[ ]========== 1
[---#----] / 1
30 - positive constant(not form ignition,direct battery)
85 - input from door contact
86 - positive constant(shared with pole 30)
87 - output to circuit breaker input
Relay type 12/14 volts 30A rating.
- Ground signal from door contact will complete circuit of the
transformer creating a magnet.Magnet will then pull contact from 30
to 87.Now windows will have power to roll up/down when the doors are open.
- Check wiring of your car, you may have this feature but may not be
- Check all wiring conform to their respective polarity.
- Hook up contact 87 to the input of the circuit breaker,
this is to prevent the window circuit from overloading.
Use this info as a guide only, if in doubt have circuit checked with
a qualified electrician or technician.I hold no responsibilities over
any faults incurred by any parties.
Any quiries please email me_at_tj1_at_writeme.com (detailed installed info available)
My power windows also utilises a one touch roll up and down.No more
holding the switches down.
Word of advice:try to avoid rolling windows together it might cause
an overload of current.
*This project can be carried in cars that is negative grounded and
with a reverse polarity power window circuit.
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