Second try at this.....lost my first response.......
It can be done, but it is tricky.
I had to get the door on my 02 open to remove the Becm which had locked the truck down, then went insane.......
Start with a wooden wedge to create a gap between the window and the top of the door.
Next, get a bright light in there. I wedged a bright Led torch in the opening.
Now, get a stiff steel rod with a hook bent on the end, and fish for the plug that attaches the lock to the harness.
I was able to get the thing unplugged without breaking the wires......your results may vary......
Once I had this done, I used a pair of wires attached to a stick to apply 12 volts to the now exposed pins on the locking assembly plug. This is the tricky bit.........
By playing with the polarity of the power, I got it un superlocked, then powered the locking servo motor, and viola!
Open door without damaging anything.
As for the no batteries rule, I would think that an 9 volt transistor battery would probably activate the motors just fine.
(Marty could confirm this?)
Also, I used a current limited short circuit proof power supply to do mine, as you will short the wires whilst trying to hit the correct contacts on the plug. The 9v batt would not be harmed too much by a bit of shorting out.
I suppose you could also use a cordless tool battery in your pocket to beat the no batts rule?
Put a 1 amp circuit breaker in line, or there will be smoke........
If you have access to an old door latch, you could practice before the real thing?
Oh, it took me about 30 min from start to finish.
I assure you it can be done, but I could have just gotten lucky..........Good luck!
Tom
I seem to be stuck on British machinery:
2002 4.6HSE "Bolt" - First P-38 Most reliable car I have owned. Go figure?
2002 4.6HSE "Borrego" Edition. Back on air and loving it! (Now moved on to a new caretaker)
2000 4.6 HSK "Fang" Wife's daily driver. all original
1985 Classic with Tdi300 Diesel conversion "Outback special" Australia
1982 Waveney Class Ex RNLI Lifeboat
1952 Austin Champ (My first car in 1975) Hawaii
1953 Austin Champ Just for fun! Australia (Sold to mate in Vic)