I installed a TCS-LL8 LED into a Walthers Proto 2000 GP30. My front headlight works fine, but the rear will not light. I did not change the wiring, just removed the board, plugged the decoder in and away we went.
The locomotive appears to run properly, aside from the rear light. The only thing I question is that the decoder only has 7 pins. The original DC board uses all 8.
Does anyone have any suggestions, or can point me towards a wiring diagram for an 8-pin NMRA plug?
It's plugged in correctly, or it would run backwards.
Guarantee it has the exact same problem as the RS-27. The rear LED is backwards.
http://www.tcsdcc.com/public_html/Customer_Content/Installation_Pictures/HO_Scale/Walthers/Proto2000_RS27_Limited_Edition/Proto2000_RS27_Limited_Edition.html
And people wonder why I rip the stock electronics out and just hard wire decoders.
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
Did the rear light ever work? Is it a bulb or LED? Here is a schematic of the plug. Only 7 pins are used.
http://www.mrdccu.com/curriculum/basics/ready.htm
Here is a great site that will help with everything DCC.
http://www.members.optusnet.com.au/nswmn2/DCC.htm
Pete
I pray every day I break even, Cause I can really use the money!
I started with nothing and still have most of it left!
Randy,
This is going to sound really stupid because I have two T1 hardwire installations under my belt, but the wires running off of the rear LED are blue and white. In those installation pictures, the rear LED's wires appear to be blue and yellow.
Pete,
They're LEDs and I'm pretty sure it worked before. I didn't run it much under DC, but I can certainly just swap the old board back in to test.
Thanks guys!
Flip them, the colors won;t match up, but I'm sure that;'s what your problem is. Which way is your loco supposed to run (aed on protoype)? The front light function is white, the rear is yellow, standard NMRA color code.
ALso if you look at the TCS pictures there is a little triangle on the 8 pin socket from the loco - you can see which side of the LL8 board this needs to be on, if it's not, you have the plug backwards. Either way I'll bet one light does not work unless you flip the blue and color wires.
I'll take it apart and look at it tonight. Hopefully it's as simple as swapping the wires around.
You caught me though; this frame came from a non-DCC high hood GP30. I bought a low hood, sound GP30 solely for its guts, swapped it into the high hood and put the DC frame and components into this GP30 that I'm now getting up and running. I guess despite there being an F painted on the short-hood end of the body, the Geep was wired to run long hood forward.
That was exactly the problem. I flipped the wires (had to extend the white one by about an inch) and it works perfectly now.
Thanks!