Glow plug wiring help needed

[KennyV]

hi, do you have a diagram of the relay only?

The glow plug relay is constantly powered by the key switch, the controller applies ground to it 's coil, that closes the contacts in the relay powering the glow plugs.

 

[Simtoutro]

As a beginner I appreciate the info in this forum
Thank you

 

[jdjanetka]

Great idea. Thanks.

 

[stonelake]

I have a L48 and the glow plug light will come on and some times flicker while running. Can you tell or show me the location of the timer, controller, and relay? I don't mind buying the parts to keep it original, but would also consider the cheaper fix with hints and pics on where and how to install. Thanks in advance..

 

[rScotty]

The glow plug relay is constantly powered by the key switch, the controller applies ground to it 's coil, that closes the contacts in the relay powering the glow plugs.

What causes the glowplug circuit to turn off? A temperature sensor or timer?
rScotty

 

[stonelake]

What causes the glowplug circuit to turn off? A temperature sensor or timer?
rScotty

I assume its a timer due to the fact that in real cold weather ill cycle it a few times for better starting.

 

[KennyV]

What causes the glowplug circuit to turn off? A temperature sensor or timer?
rScotty

The circuity in the controller uses a signal from engine coolant temperature, (see reference # 11 at the Bottom of the schematic), to establish a time to keep the glowplug relay energized. The glow plugs get very hot Very fast... they do Not need to be 'on' for very long... If you replace the controller with a manual switch, remember Short duration energizing will do the job, too much on time and you risk burning them up... KennyV

 

[Aggysoares]

Just a follow up to say thanks for you guys help. The glow plug controller was faulty. I decided I would rather have a toggle switch to control the glow plugs with rather than a new controller.
I picked up a 3 position toggle switch (one position is momentary) DPDT plus a weather cover ($17 total) and with the help of KennyV's wiring diagram wired it in a Auto-Off-Hand configuiration.
Auto- leaves all in original condition
Off- drops power to the glow plug control
Hand- (momentary) drops power to the glow plug control and completes
ground circuit to glow plug relay to operate glow plugs

Works great and someday when I pick up a new controller I can just change that out and it will work normally if I want.

Jerry

hi Jerry how are im new to all this I have a L2900 I was wondering if you help me on how you did you wiring I like to do the same as you did.Thank You
Aggy