GG1 Light bulbs

They're 6V 60ma 3mm diameter bulbs.  That makes them .36W bulbs.

6V grain of wheat bulbs- that's the standard for all variants of MTH PS2.

If it's a PS2 engine and you need a bulb- it's a 6V for sure.

That said, you said markers, and those are not bulbs, those are tiny LEDs.

So what you do is, you go over to MTH Parts and Sales and you try to do a parts listing breakdown lookup. https://www.mthpartsandsales.com/

you click on

In this case, the nearest match to your engine may be the 5V variant even if yours is PS2 3V because that's what listings are populated at the moment

marker LEDs red or green

Bulbs

Thank you John and Barry. I had put in 3 volt and they aren't working. Oh well time to change them out. Thanks again guys.

@Vernon Barry posted:

6V grain of wheat bulbs- that's the standard for all variants of MTH PS2.

If it's a PS2 engine and you need a bulb- it's a 6V for sure.

That said, you said markers, and those are not bulbs, those are tiny LEDs.

So what you do is, you go over to MTH Parts and Sales and you try to do a parts listing breakdown lookup. https://www.mthpartsandsales.com/

you click on

In this case, the nearest match to your engine may be the 5V variant even if yours is PS2 3V because that's what listings are populated at the moment

marker LEDs red or green

CE0000005

CLASS LAMP LEDS / GREEN / 2 LEDS / ASSORTED WIRE LENGTHS / MICRO MINIATURE / PS2

7

$7.00/ea

CC0000062

MARKER LAMP LEDS / RED / 2 LEDS / MICRO MINIATURE / INCLUDES 8-POSITION 3V HARNESS / FOR PS2 & 3 STEAM UPGRADE KITS

21

$9.00/ea

Bulbs

CA0000111

LAMP / 6V / 2.3mm D x 6.6mm L / ASSORTED LENGTH WIRES / DOUBLE LAMP (2) / GRAIN OF RICE

19

$7.50/ea

<input class="form-control" id="qty_2829" min="1" name="qtyaddtocart" placeholder="QTY" step="1" type="number" value="1" />

	CA0000079	LAMP / 6V / 3mm D x 6.6mm L / ASSORTED LENGTH WIRES / DOUBLE LAMP (2) / GRAIN OF WHEAT	19	$4.00/ea	<input class="form-control" id="qty_2797" min="1" name="qtyaddtocart" placeholder="QTY" step="1" type="number" value="1" />
	CA0000074	LAMP / 6V / 60mA / 3mm D x 6.3mm L / ASSORTED LENGTH WIRES / SINGLE LAMP / GRAIN OF WHEAT	19	$4.00/ea

Thanks Vern!….I was just sitting down for breakfast and gonna look this stuff up for the fella!…….job well done, I’ll continue on with eggs Benedict, and some toast!….would you like white or wheat Vern? …….😁

Pat

There are a handful of MTH engines that actually used bulbs in the class/marker lights, so it's best to make sure.

@gunrunnerjohn posted:

There are a handful of MTH engines that actually used bulbs in the class/marker lights, so it's best to make sure.

The Railking uses bulbs and plastic red & green captures, ….thats for sure,….The Premier is best to pop the shell off and have a look around, ….i think they did them both ways….

Pat

For a Scale GG-1 PS-2 the markers are bi directional with 3 wires and they run off a separate light board in the engine.  Hope your not testing them with the harness connected to boards.   G

George I had lights that burned out. I thought these were 3 volt, and I tried starting the engine up and they worked and then restarted engine and they didn't work. So that's why I asked. Thank you every one for the help.

A lot of times it is the spring loaded connector making contact to the contact pad on the chassis.  The GG-1 use a double spring so you can wind it out to protrude more.  Also make sure good contact with the light plug.  G