Amtrak Genesis (20-2189-1) Headlight

I believe that particular Genesis had Protosound 1 and came out in 1998 which would make it 25 yrs old, so it’s pretty dated and the part number to which you refer may very well have been superceded by another one.  Hopefully the likes of Gunrunnerjohn or GGG or someone else proficient in repairing MTH engines will be able to assist you.  That said, at the moment you are not able to communicate directly with MTH Parts and Service due to the fact they are currently relocating.

Good Luck!

Drop me an email, I have plenty of dual headlight assemblies with the 6V bulbs.

Are you sure those are 6V bulbs?  The actual headlight of the 1998 Genesis is a single 1.5V bulb as it's powered directly from the directional headlight output of the PS/1 board set.  The dual bulb assemblies are used for the other lighting and powered by a CV board.

You can download the parts guides for older MTH products here: https://mthtrains.com/news/558

Like John says. I thought the 6 volt bulbs showed up in PS2.

Here is a photo of the part description from the owner's manual.

@John H posted:

Like John says. I thought the 6 volt bulbs showed up in PS2.

PS/1 had plenty of 6V bulbs, but they were all powered by an aux power supply.  The raw directional headlight is a 1.5V bulb.  Some diesels had a special board that actually took the 1.5V from the PS/1 board and used an opto-coupler to switch their standard 6V bulb, but apparently the PS/1 Genesis just used a 1.5V bulb directly for the headlight.

On this parts page, it looks like 88 is the headlight, and they are 1.5 volt. Not sure where 83 goes.

Further to GRJ and John H’s comments above, the Owner’s Manual for this engine also states in part under Headlight Replacement “Once the cab has been separated from the chassis, gently unplug the bulb’s wiring harness from the socket on the constant voltage circuit.

For PS-1 The Genesis use 2 2 position 6V CV boards but I thought that was for Interior, and number boards.  Can really remember but I think you have a large center light to.

Regardless of the instructions you need to follow the HL plug to were it goes.  If it goes to the CV it is 6V bulbs, if it goes to the PS-1 board blue connector they are 1.5V and diesel did use double 1.5V bulbs.

Some diesel that had the complex CV board like the F-3 and E-8 and many others used 6V bulb but the HL was triggered off the PS-1 board for directional control.  Everything else on with track power.  G

George, you are correct, the actual headlights are 1.5V bulbs.