PS2 wiring harness into PS1 engine

You can use the PS1 motors, but will need the appropriate size tach tape and a tach mount for one motor.  Incandescent lights will be 6v for PS2; some PS1 locos will have 18 volt lamps (track powered) and 1.5 volt lamps for ditch light, etc.

I have all the lights because i bought it on e-bay knowing it had bad motors. I'm going to use it as a dummy and was hoping to be able to use the harness. Everything works so i could have a lighted sound dummy however I was thinking maybe I could have both. What is tach tape and tach mount?

The tach tape is a adhesive strobe wrapped around the flywheel.  PS2 motors have this strobe painted on the flywheel.  PS1 motors just have brass flywheels.  The size of the tape corresponds to the flywheel diameter in mm. MTH sells a tach sheet for common flywheel sizes. PS2 motors have a tachometer holder for the electronic tach required for the PS2 board.  It can be retrofitted to PS1 motors using zip ties.  Of course, the appropriate sound file will needed to be loaded in the PS2 board to have the correct sounds and speed control which is based on wheel diameter (pretty much the same for all diesels), flywheel diameter and gear ratio. 

Why not just Replace the bad motors?

Much easier job.

With a PS/1 locomotive, you can use the standard retrofit tach mount that comes with the upgrade kit, I have a bunch of them in my parts box if you need one.  As far as the tach tape, you can print your own using gummed shipping sheets.  For your convenience, here's the MTH tach tape in PDF form, print this at 100% scaling on the shipping labels.  FWIW, the tach mount is how the upgrade kit mounts the tach reader in PS/1 upgrades, it's specifically designed for those motors.

MTH PS2 Tach Tape Image.pdf

Here's the parts and tape image I'm talking about.

Jon,

PS2 motors have this strobe painted on the flywheel. 

Actually, PS2 motors were manufactured two ways. Some had painted stripes and some used the adhesive strip.

My other SD70 has one with painted stripes and the other is solid black. I'm going to Wheaton, Il to the train show this weekend so i'll have to see what they have. Main reason I wanted to wire up a ps1 motor is to buy an SD40-2 at the train show. I can usually pick one about around 100-125 vs 350-400 for ps2 

You can put the striped tape on any standard flywheel.

Thanks everyone, I picked up a SD40-2 w/PS2 and a pair of motors so we'll see how it goes, thanks again

   Gary