Does anyone know of a website that details installing a decoder in a GP35? This one is an older model (early 90's) so it has to be hardwired. If you have any insights I would appreciate it. Thanks
Have a look on page 10 of the following .pdf files from Tony's Trains - http://www.tonystrains.com/download/dec-installation-hout.pdf It has a drawing of what looks to be a typical Athearn chassis layout.