Cold Starting and Cold Driver
.....pu em kcarc uoy
Senior User
Joined: Dec 2006
Posts: 254
Likes: 0
Senior User
Joined: Dec 2006
Posts: 254
Likes: 0
Glow Plug Relay
Controls the current flow to the glow plugs. Glow plug relay "ON" time is controlled by the PCM and is a function of engine oil temperature, barometric pressure and battery voltage. "ON" time normally varies between 10 to 120 seconds. The glow plugs are self-limiting glow plugs and do not require cycling on and off. (The glow plug relay will only cycle on and off repeatedly when there is a system voltage condition greater than 14.5 volts.) Glow Plug Wait to Start Lamp
Lamp that indicates to the operator when the glow plugs have been on long enough to crank the engine. It is controlled by the PCM. Wait to Start lamp "ON" time is a function of engine oil temperature, barometric pressure and battery voltage. "ON" time normally varies between 1 to 10 seconds. (NOTE: Wait to Start lamp "ON" time is independent from glow plug relay on time.) Fault Detection/Management
An open or shorted to ground glow plug relay in the control side (coil) or Wait to Start lamp circuit can be detected by an on demand output circuit check performed during the Engine Off Tests. The glow plug relay (power/switch) side, glow plugs and glow plug harness problems can not be detected by the PCM.
Postmaster
Joined: Jan 2004
Posts: 3,207
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From: Kearney, Nebr
Hold on a sec... you have two John Deere tractors that you never use ether on? I could go outside right now and try to start any my older tractors up and they wouldn't do a thing without ether. (actually they probably would, but it would take some serious effort). They would start fine if they are plugged in. Fortunatly those babies are common rail instead of our crappy Heui systems.
Postmaster
Joined: Jan 2004
Posts: 3,207
Likes: 0
From: Kearney, Nebr
Back when we used to have old tractors... (4650,4630, 4440, 4455) They would all need a little shot to get them going when its below freezing. The new ones do a lot better than those old ones. Makes a huge difference if they are parked in a shed or out in the middle of a field.
