L3010 glow plug light always on
- Thread starter Smay71
- Start date
- Views: 7002
Gordon Gould
Super Member
- Joined
- Apr 1, 2007
- Messages
- 6,759
- Location
- NorthEastern, VT
- Tractor
- Kubota L3010DT, Kubota M5640SUD, Dresser TD7G Dozer
Welcome to TBN.
Pretty often, if not most of the time from whan I have seen, it is the timer that is bad. I believe the light is driven by the timer and the relay only drives the glow plugs themselves which would explain why the light is still on when you pulled the relay. The timer was about $65 when I changed mine and it was a guess what was bad. So I changed the relay first because it was cheapest then had to order the timer because that was the problem. I ordered my parts from Messicks online.
Edit: I should have used the term Controller, as the8080 did, rather than Timer to make it less confusing as there is also a Timer Unit associated with the fuel valve shut off.
Pretty often, if not most of the time from whan I have seen, it is the timer that is bad. I believe the light is driven by the timer and the relay only drives the glow plugs themselves which would explain why the light is still on when you pulled the relay. The timer was about $65 when I changed mine and it was a guess what was bad. So I changed the relay first because it was cheapest then had to order the timer because that was the problem. I ordered my parts from Messicks online.
Edit: I should have used the term Controller, as the8080 did, rather than Timer to make it less confusing as there is also a Timer Unit associated with the fuel valve shut off.
Last edited:
the8080
Member
Same as above on my L35. The light and relay are two different outputs on the controller. If the relay doesn't click off when it should, the controller is broken and the light is showing you what it is doing. You have done the right thing by disconnecting the relay and need to replace the controller.
the8080
Member
If the light goes off but the relay doesn't click off, the relay is the problem and needs to be replaced.
