Is there a way I can probe onto the leads of my central locking system's vacuum pump to engage it without using the door lock. There are 3 wires going to it, not sure what's what. One has to be common, then the other two are I am guessing the 'lock' lead and the other would be the 'unlock' lead. But I'm not sure. My haynes manual says what fuse the pump is on... but that's it. No schematics on that. They have schematics for just about everything else BUT the central locking system. Thanks.

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1984 190D 2.2 Auto 220k
2001 Jeep Cherokee Sport 70K
2004 Lexus RX-330 ??K
2005 Chrylser Crossfire LTD 6K

Play guitar? Go to www.cyberfret.com for free online lessons!

Your guesses are correct regarding the three leads. The brown is the ground wire the yellow and blue are lock and unlock. Not sure which is which but you can experiment and find out.

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2001 Dodge Ram 2500 Cummins Turbo Diesel - 4x4, auto, 3.54 gears, long bed
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'92 300D 2.5 Turbodiesel - sold
'83 300D Turbodiesel - 4 speed manual/2.88 diff - sold
'87 300D Turbodiesel - sold
'82 300D Turbodiesel - sold

Ok so +12VDC to either the yellow or blue and -12VDC to the brown and the pump should operate? Is there are time limit to how long I should apply the voltage to it?

__________________
1984 190D 2.2 Auto 220k
2001 Jeep Cherokee Sport 70K
2004 Lexus RX-330 ??K
2005 Chrylser Crossfire LTD 6K

Play guitar? Go to www.cyberfret.com for free online lessons!

Yeah, just keep the voltage applied. If you don't have any vacuume leaks, the pump should operate for about 10 seconds or less and then cut off.

__________________
2001 Dodge Ram 2500 Cummins Turbo Diesel - 4x4, auto, 3.54 gears, long bed
-------------------------------------
'92 300D 2.5 Turbodiesel - sold
'83 300D Turbodiesel - 4 speed manual/2.88 diff - sold
'87 300D Turbodiesel - sold
'82 300D Turbodiesel - sold