How to use 9v train motor with PF system?

[mikezang]

I have no new PF train motor, and I tried to use old 9v train motor, but I found if I put 2x2 plate with wire to 9v train motor, the bogie plate can't be rotated as 2x2 plate with wire is too thick, is this right? Do I have to make a 2x2 plate with wire by electronic plate?

[JopieK]

would this give you a hint: http://letsbuilditagain.com/instructions/4512/ ?!

[alainneke]

I also ran into this problem when adding PF LEDs to my 9V Maersk train. The distance between the bogies on this train is bigger than with other LEGO trains. When you put a 9V connector on top of the 9V engine, it's studs will interlock with the train baseplate and the bogie will be prevented from rotating.

My solution was to use the 9V cable with thin connectors (http://www.bricklink.com/catalogItem.asp?P=5306ac015). The connectors on this cable are only 1 plate high, so they don't catch the train baseplate:

Maersk train power connector by alainneke, on Flickr

Maersk train power connector by alainneke, on Flickr

Edited October 2, 2013 by alainneke

[mikezang]

I also ran into this problem when adding PF LEDs to my 9V Maersk train. The distance between the bogies on this train is bigger than with other LEGO trains. When you put a 9V connector on top of the 9V engine, it's studs will interlock with the train baseplate and the bogie will be prevented from rotating.

My solution was to use the 9V cable with thin connectors (http://www.bricklink.com/catalogItem.asp?P=5306ac015). The connectors on this cable are only 1 plate high, so they don't catch the train baseplate:

Maersk train power connector by alainneke, on Flickr

Maersk train power connector by alainneke, on Flickr

Can I solder wire to electric plate 1x2 with contractor instead of it?

[alainneke]

Can I solder wire to electric plate 1x2 with contractor instead of it?

Sure, just watch out with the heat...

[zephyr1934]

If you are comfortable with a soldering iron, you might want to get one of the old electric plates, e.g., 4757 and use that as your main connection point. They came in 1x2, 2x4, and 2x8. You could easily cut a 2x4 in half or use a 1x2 for your connecter. Then again, if you have a 9v motor that you want to use for PF, you'd probably be better off selling or trading it.

[Lazarus]

I would swap u a PF motor for a 9v one no questions asked.

But i find with the cable coming off the motors they are a bit stiff to turn if the cable is brand new. Also i think the PF cable is a bit thicker than the one you are showing in the pic. Maybe move the cable to the rear slot in the base see if that helps or maybe take the cable out and flex it a bit to loosen the cable up a bit.