Lionel 1688 wiring

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  • Member since
    December, 2016
  • 180 posts
Lionel 1688 wiring
Posted by trains2353 on Sunday, October 29, 2017 2:39 PM

Acquired a very nice Lionel 1688(not an E). Headlight lites up, but no movement or e-unit noise. Removed the body; found 2 wire not connected. How can I find out were they need to go? I put some pics in if that helps. I understand there are 3 different motors in the 1688. I believe I have the 3 type. It connects to the body with 2 long screws.

Any help greatly appreciated.

http://pic80.picturetrail.com/VOL1001/4368153/24788991/413621749.jpg

http://pic80.picturetrail.com/VOL1001/4368153/24788991/413621750.jpg

http://pic80.picturetrail.com/VOL1001/4368153/24788991/413621751.jpg

http://pic80.picturetrail.com/VOL1001/4368153/24788991/413621752.jpg

 

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Posted by TrainLarry on Sunday, October 29, 2017 3:42 PM

Here is the wiring diagram for the 'E'-unit. It is the same for most engines.

Larry

  • Member since
    August, 2010
  • From: Henrico, VA
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Posted by Firelock76 on Sunday, October 29, 2017 4:44 PM

You may want to consider replacing those wires, they look nasty!

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Posted by rrswede on Sunday, October 29, 2017 5:27 PM

Although Larry's statement is true, that being his schematic is the same for most engines, I am not sure it is true for this locomotive. Please look at the Olsen's Toy Train link.

http://pictures.olsenstoy.com//cd/b123/000546.pdf

swede

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Posted by TrainLarry on Sunday, October 29, 2017 6:07 PM

The different schematics have either the field or brush windings reversed by the E-unit. It does not matter what set of connections is reversed, as the results are the same.

Any motor can be wired either way with the same results.

 

Larry

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Posted by trains2353 on Monday, October 30, 2017 7:38 AM

Thanks guys! I'll be looking at the diagrams today. Wiring is nasty, but going to try and use it. Some wiring color is left, but not much.

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Posted by trains2353 on Monday, October 30, 2017 11:52 AM

After all morning, I have the e-unit working. I got the motor to hummm, but not move. Saw a little smoke from it, so stopped what I was doing. Tried to find a pic online of the motor; none clear enough to see where the wiring went. Perhaps look online for a good running chassis as the body for this one is very nice. Or send it out for repairs.

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Posted by TrainLarry on Monday, October 30, 2017 12:20 PM

Do not concern yourself with the wire coloring, as it will not match the schematic.

Identify the 2 Field winding connections and the 1 (left) Brush connection. The right Brush connection is grounded.

Follow the wiring on this schematic provided by Swede above and you should get the motor to run.

Larry

 

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    December, 2016
  • 180 posts
Posted by trains2353 on Tuesday, October 31, 2017 9:29 AM

Thanks Larry; will try that.

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    November, 2011
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Posted by Postwar Paul on Sunday, November 05, 2017 11:40 AM

That diagram is correct. I repaired my 1688. One brush goes to frame ground, instead of the field coil going to frame ground, as in most engines.

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    December, 2016
  • 180 posts
Posted by trains2353 on Sunday, November 12, 2017 9:27 AM

Still working on it. The wire from the pickups fell off. Will do more when I solder a new wire back on. The wire that go to the e-unit are going to be a problem to get back on. Looks like they are soldered into a small hole. Guess I need a pencil type soldering gun.

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