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I have searched the many options for a significant replacement for this pcb front light board.  I am even wondering if this board is even available still.

My front headlight is inoperable, so thinking I'll just try a new board.  If I can find one.. 

Lionel parts that might work are 6304776331, 6304776332.  These two parts might replace the I am looking for.

Look at the picture provided, if anyone know this parts number.  Any help from the forum would greatly appreciated.

Thanks in advance.

2013-05-16_08-44-10_820

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  • 2013-05-16_08-44-10_820: Front light pcb from 6-28259
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I notice the Lionel 6-28259 Parts List conveniently omits any mention of this board unless it's considered part of the shell.

 

Since the components on that board are very simple, it can probably be revived if it's truly not working.  I'd start by trying to determine if the headlight power is making it to the board.

 

Question, do the marker lights work?

No the marker lights do not work either.  When I would switch directions; the rear headlight is on and marker lights turn green, but nothing in the front.  The front is dead, and no red marker lights when in reverse.  When in forward direction, no green marker lights, but ditch lights would flash when horn is applied.  

The board is tied in series with the rear lighting board.  I checked voltage.  voltage is going to the board, I even switched the rear lighting board to the front.  Wella'! the rear board worked.  I then moved the front board to the rear connection.  Same results, no lights.  I am pretty sure it the board.  All the cab lights and ditch lights work properly.  The 4 pin connector comes off a 9 pin connector harness that goes to the main control board.

I will give reprogramming a try. And go from there.  

Thanks everyone for assisting me in this strange scenario.

 

Bill:  would know if Lionel offer a equivalent items for this board?

Other Legacy SD40-2 engines have these components 63044776331 and  6304776332

as the pcb boards for the front light assembly. 

If when you swapped rear board to front, and it worked, I doubt reprogramming will help. if the marker light diodes are bi-color and switch from red to green, be VERY careful, they work on about 2.5 volts and even 3 volts will damage them! Lionel has gotten away from the bi-color leds as they are troublesome, that's why they probably don't stock direct replacement boards for your SD40.

I was referring to the lighting distribution board. An example is for a GP-7 is 620-8340-115. I'm pretty sure his SD40 has one, but no longer available. I have seen problems with this board there. If the poster said the checked all the LEDs and they worked, that would be my next guess. At this point I wouldn't rule anything out. If he get's it operational, I hopes he posts what the problem is. Since he said when he swapped boards and the rear worked in the front wiring harness, I am at a loss. 

Chuck, that's where I'm at as well.  If the rear board worked with the front harness, that would seem to narrow it down to the front board.  However, if the board works when applying voltage directly to the connector, that would seem to eliminate the front board as the problem.  Also, from the pictures of that specific board, there is very little to go wrong with it.

 

It would seem that all the components work, just not when plugged together!  I think this is one I'd have to see in order to figure out what is really happening.

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