Okay I had a problem with my Kubota l4400 and I had to change the OPC timer but after installing it now my when I turn my key backwards to initiate the glow plug warm up nothing works. The light does not illuminate and the plugs do not warm up I checked all my fuses and relays yesterday and have not found anything blown. With winter coming on and having to use that tractor to feed hay I am in a frenzy any help would be greatly appreciated thank you