I'll take a swag at the glow plug indicator. I'll guess it'll glow when power passes through it.
To determine how it's supposed to be wired, start off by tracing the wire from the glow plugs. Does it go back to one side of the indicator? If so it was probably wired in series w/the glowplugs and the other side of the indicator should go to the glowplug on/off switch. Some models have a stand alone glowplug on/off switch while others have a glowplug energize position on the key switch.
On the other hand, if one side of the indicator is wired to frame ground, it's safe to sat that it's wired in parallel with the glow plugs. Meaning power (12vdc) is wired from the on/off switch to the glowplugs and the other side of the indicator is wired to the same spot as where the power lead is wired to the glowplugs.
Clear as mud?

 

Thanks,
the wiring is gone in some areas so I can't trace that part. Since the glow indicator is more than just a light bulb I assume it is also there to limit the current to the glow plugs. I will wire it in series with the glow plugs and see what happens.

 

The diagram shows glow lite between G1 &G2 of the Key switch, G2 then goes to the glow plugs via black/red wire.

On my G6200HST the glow lite has never been visable( glowing) yet the glow plugs work as designed.

Do you have the key switch? If not I can ring mine out to see if the "glow light" is actully in series with the plugs.:wwp:

 

I'll look and see if I have a wiring diagram. I have two G4200's. I think my manual covers all in this series.
Chris

 

Thanks,
The key switch is there but no key and not much wiring.

 

Sorry for not getting back to you sooner but I do not have a wiring diagram. I thought I had a service manual but it was a parts manual.
Good luck.
Chris

 

If you ever want to sell that G5200 let me know.

 

I bought it to get the engine. Sometime this fall I'll remove the engine to put in another project. If there are parts you need the send me a message.

 

I need the Hood and grille if they are still available. I'll send you an E-mail.
Thanks :thanku:
Chris