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Athearn GP35 wiring problem

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  • Member since
    October 2003
  • From: Lincoln, NE
  • 111 posts
Athearn GP35 wiring problem
Posted by paxton58 on Monday, April 26, 2010 3:19 PM

 Loose wire from bottom of frame and don't know where on circuit board it connects.  Any help would be appreciated.  Thanks.

Links to photos.

http://www.trainboard.com/grapevine/album.php?albumid=982&pictureid=13001

 http://www.trainboard.com/grapevine/album.php?albumid=982&pictureid=13003

  • Member since
    February 2002
  • From: Reading, PA
  • 30,002 posts
Posted by rrinker on Monday, April 26, 2010 3:32 PM

 I'd edit the links to make them clickable but if you don't have a Trainboard account you can't see them anyway.

 The loose wire is the bottom motor wire. It goes where that partially pushed on black plastic clip is on the side of the circuit board (on the right in your picture). Pull the black cover off, stick the bare end of the wire in the hole, and push the cap back on. Better yet, solder it for reliability, although that makes it tougher to remove the circuit board and motor should you have to.

                                     --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

  • Member since
    October 2003
  • From: Lincoln, NE
  • 111 posts
Posted by paxton58 on Monday, April 26, 2010 4:06 PM

 That was the first position on the right end of the circuit.  Did that but now the engine runs in reverse when placed on the track and does not respond.  CV 29 was programmed as 34 to eliminate the DC operation.

 

I am not sure how to post photos to this site.

  • Member since
    February 2002
  • From: Reading, PA
  • 30,002 posts
Posted by rrinker on Monday, April 26, 2010 5:45 PM

 That's the right place. Do you have the decoder in the 9 pin or 8 pin connector? If it's in the 8 pin, it might be backwards. If you connected the motor to the left-hand terminal in the pic then both motor terminals would be connected to the same decoder connection and it definitely would not move. Runnign in reverse is a symptom of either a backwards 8 pin plug or an incorrect value in CV28. 34 would be correct for 28/128 speed steps, 4 digit address and normal forward operation. Are you sure it's 34 and not 35? 35 would make it run in reverse.

 You probably can't link pictures posted on Trainboard. This forum has no upload space so you have to put your images on a publicly accessible picture sharing site like Photobucket to be able to post them here. From Photobucket you could post them anywhere, including Trainboard. Or if you get web space from your ISP, you could put them there.

                                                --Randy


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

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