wiring new E unit

The 671 has three tabs sticking up on the brush plate. The center tab is the connection to the field. That is where the green wire goes. The two outside tabs are the brush connections. That is where the yellow and blue wires go. Does not matter which goes where. The black wire goes to center rail power. Usually a tab sticking up through the frame covered with a fiber sleeve is coming from the center rail rollers.

thanks do much. a big help. headlight and smoke connect where?

Same place the black wire connects.

I wired the e unit as you said When I put the engine the track Nothing happens. See my pics

I think the black center rail wire to the side of the E unit is on the wrong side causing a direct short  if you connect the switch or the coil doesn't get power directly.    The center rail wire goes to the post on the opposite side of the E-unit switch/lever connection.

The center rail wire goes to the post on the other side.  It should be insulated from ground.  1 small wire from that post goes to the e-unit coil.  Usually the black wire from the front of the E-unit goes to this post also along with light wires, but connecting it the way you did should work.

The other side a small wire from the coil goes to the post for the switch.  When the switch connects it completes the ground energizing the E-unit when power is applied.

This may help

ok I changed the one black wire to the  other side of the e unit. still nothing See pics

I need a close uo you tube video showing exactly where wires go. Im good at this part of my resto

I mean I'm NOT good

I have added more details and pictures.  to my This may help, E unit page.

Do you have a voltmeter or some way to check that it is getting power from the center rail.   I know remote diagnostics is hard. 

This is a fantastic site page you made so easy to follow. Thanks.  Do you have any recommendations for electronic e units for Perwar Locos?  I have a Lionel 260E runs at 3-4 Amps Maybe as much as 6 amps on load and high speed. However i do not want to run fast but i am worried about burnout of the electronics. Thanks

Electronic Model Railroad  E unit is an E-unit with 10Amp relays for handling the current.  Low load on the electonic part.

I get most everything   But there something I don't understand  That is that the black wire coming out of the E unit goes to rail power tab then why does the unit require another power connection the units top tab Why does the E unit require 2 power connections?

@Bob is cool! posted:

...why does the unit require another power connection the units top tab Why does the E unit require 2 power connections?

There is a solder tab on the terminal board for use as a connection point for the motors(black wire), E-unit hot side of coil, headlamps, and the wires from the collectors/rollers. The lever is the on-off switch to (chassis/ground), for the E-unit coil.

The connections at the bottom are for the motor(s), switched by the E-Unit activation/action. The black wire goes to the terminal board as a form of strain relief and a convenient place to have all center rail connections made.

So the black  wire coming out of the E unit bottom goes to the terminal board which is what part?

@Bob is cool! posted:

... the terminal board which is what part?

Outlined in red.

That's what I thought. Thanks so much for the picture

so what wire connects then to the center rail tab which connects the to the collectors

It depends on the motive power, usually a black wire, sometimes two like on the FM diesels and late F3's.

This is typical for a basic diesel with two headlamps.