I have heard all kinds of options on this and I have this one on my dodge works far better than the factory one ever thought of working these work are easy to install price is right buy the 69.00 one and that is free shipping because it has the block sensor and the after glow

Diesel Engine Pre Heating Kit, Diesel Engine Heating Kit, Fourthgen Automatic Diesel Engine Glow Plugs Heating Kit.

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oh 1 other thing they are out of India it takes about 2 weeks to get it and I am not affiliated with them I have just used them and will use them again when I am getting close I will be ordering one myself

 

I have found the Benz glow relay to work great, not only does it have after glow, but it will tell you when one or more glow plugs is bad. when the indicator light blinks, one is bad, when it fails to light (but you can still hear the relay working) two or more are bad.

 

Is this what your looking for?

 

that's exactly what I'm looking for!
Thanks

 

Here we go on pins.
Large Red wire = 30 -Positive of battery
Tan wire = 31 -Ground
Red w/black stripe = 15 -Energize relay (ignition on)
Purple or Violet = 50 -Safety switches (not needed to run)
Blue w/white stripe = LA - indicator glow lamp on dash

Hope this helps.

I wasnt smart enough to be signed in to see pics, looks like you got what you needed.

 

In my factory Benz manual, one of the wiring daig (I think for the 300 but not 300sd) the purple went to a temp sender on the head, and the other showed it going to the starting circut, to keep it energized while cranking. So I assume there is two relays depending what chassie. Mine are off the sd

 

Is the temp sender wired directly to the GPR? If so, I may have to find out what car mine goes to before I wire it up.

 

Ok, got the book out. Pre 1981 uses the coolant sender to determine the length of glow time, after 1981 it has a temp resister inside the relay to do this. It looks like the one in your pic is the latter relay, hope that helps.

 

Im new to this site and not really too sure if I am posting in the right spot but I recently just bought a 88' jeep wrangler as a project jeep. The guy I bought it from was attempting to do a om617 swap into it...he had all the adapters for the flywheel and the frame mounts ect. but didn't complete the install. so I was hoping someone on here could help me!!!!! I have the engine mounted in and hooked up to the tranny but have no clue how to go about wiring up the glow plug relay that came with it or the alternator?? and any other tips would be appreciated!!

 

This will help if you have a one wire.
OneWireAlternator


Glow plug wiring.
vincewaldon.com - HOW-TO: Pimp your glowplug wiring