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  • Topic: PRR MP-54

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    • May 20, 2020 2:15 PM EDT
      • Fort Myers Beach & Annapolis, Florida & Maryland
         
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      Lou Luczu said:

      It works if I apply power to one of the 2 connectors. I just can't figure out where the 2 connectors connect to and how I get track power to turn the wheels.

      Surely the other 2 are to the wheel pickups?  This is a standard Aristo Doodlebug motor block, which I think is the same as the FA ? Someone must have fixed one. Lou - I found the exploded parts diagram if you want it - but it doesn't have a wiring diagram. Doesn't even show the wheel pickups; just the motor feed.

      This post was edited by Pete Thornton at May 20, 2020 2:18 PM EDT
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    • May 20, 2020 7:54 PM EDT

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      It's 2 wires like a wash machine ....hot and cold

    • May 21, 2020 5:49 PM EDT
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      It would appear that connector LL takes the wheel pickups (strips X,Y in front, wires Z,AA to the rear) and brings them to the top of the truck.  Connector KK just links to the motor.

       

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    • May 22, 2020 10:34 AM EDT
      • East Brunswick, N J RRR#22
         
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      Is this too obvious? Connect the 2 connectors together for track power?

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    • May 22, 2020 12:17 PM EDT
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      Lou Luczu said:

      Is this too obvious? Connect the 2 connectors together for track power?

      Yes, I guess so. Should be quite easy to test with a meter set to measure ohms?

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    • May 22, 2020 8:28 PM EDT
      • Candlewood Valley, Connecticut
         
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      Lou Luczu said:

      Is this too obvious? Connect the 2 connectors together for track power?

      Yes, exactly.  Polarity will determine direction. Simple as it gets.

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    • May 23, 2020 8:45 PM EDT

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      Hook it up Lou!

    • May 24, 2020 12:41 PM EDT
      • East Brunswick, N J RRR#22
         
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      Progress Report:

       

      And these are the connectors I was talking about. Then I realized I have to figure how to get power to the headlights, inside lights, and red end lights.

       

      BTW the "Front" is to the right in above picture. The Postal End is the "Back" and needs to have the red end lights and the pantograph.

      This post was edited by Lou Luczu at May 24, 2020 12:43 PM EDT
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    • May 24, 2020 6:15 PM EDT
      • Candlewood Valley, Connecticut
         
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      Then I guess you will be doing a bit of wiring.  you may want to consider a center off polarity switch while you are at it (like recent Annies). Handy for parking on a powered track.  If you can rustle up a connector/switch board from a battery conversion job you can save yourself a little work.  Personally; I'd just scratch build whatever I need. It's not complicated.

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    • May 24, 2020 7:45 PM EDT
      • East Brunswick, N J RRR#22
         
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      Says you.

      I'm lucky if I can put a battery in a clock and have it work.

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      "If I ever go looking for my heart's desire again, I won't look any further than my own backyard. Because if it isn't there, I never really lost it to begin with." - L. Frank Baum

    • May 25, 2020 9:06 AM EDT
      • Candlewood Valley, Connecticut
         
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      Lou - If you want to attempt it, give me a list of what the lights are (filament lamps or LED), how many, and where they are located and I'll sketch up a wiring diagram for you.  I can't teach you to solder, but you could probably get away with using crimp connectors.

       

      Also, do you want to be able to switch the lights on and off?  Do you want the lights to be on when motor is off (parked on a powered siding)?

       

      You will need to figure out which connector is the motor and which is track power.  Not hard with a simple meter:  Off the track, one connector will read infinite ohms (open circuit) - that one is the power pick up. The other will show low ohms (resistance ) and that will be the motor.  If you don't have a meter, a 9V battery and some wire will work. Motor will run, or at least jump, when connected to the battery.

      This post was edited by Jon Radder at May 25, 2020 9:08 AM EDT
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    • May 25, 2020 1:32 PM EDT
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      Lou Luczu said:

      Says you.

      I'm lucky if I can put a battery in a clock and have it work.

      Lou, I thought I left the wiring inside my original Doodlebug, some of which is in your MP-54?  Take a look and see if it might be re-usable. This pic is on page 1.

       

      This post was edited by Pete Thornton at May 25, 2020 1:38 PM EDT
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    • May 25, 2020 1:44 PM EDT
      • East Brunswick, N J RRR#22
         
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      Oh, is that what that was?

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    • May 25, 2020 4:40 PM EDT
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      Lou Luczu said:

      Oh, is that what that was?

      Yes. I think it was attached to the body and the wires (including the rear passenger section,) are still in place. A marker lamp is missing, as you can see in the photo.

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    • May 26, 2020 3:13 PM EDT
      • East Brunswick, N J RRR#22
         
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      I remember seeing it. I took it off and put it in a safe place.

      ???????????????????????????????

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      "If I ever go looking for my heart's desire again, I won't look any further than my own backyard. Because if it isn't there, I never really lost it to begin with." - L. Frank Baum

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