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hitachi ex300lc no elc power
- Thread starter Oren
- Start date
John C.
Senior Member
I don't have a diagram but do remember there is a fuse link back by the batteries. I've seen a shorted glow plug make for some issues. Check color and shape of the bar that connects all the glow plugs. When a plug shorts it pulls a bunch of current blows a fuse. It also blows a diode behind the operator seat. You can check the glow plugs with an ohm meter while they are installed in the machine. As I recall they were about 7 ohms of resistance when good. No resistance when shorted and infinite resistance when just burned out.
Let us know what you find.
Let us know what you find.
tool_king
Senior Member
Yes John there will be fuse link off the battery relay to power the key switch. You will have a battery relay between the batteries and starter .What dash number is your machine ?
tool_king
Senior Member
John
I emailed you some schematics to you .
John C.
Senior Member
A big shout out to tool_king for that. I keep a file folder for all this kind of stuff and print out the pages for the three ring binder I keep in the truck. I've got some studying to do on this material.
Thanks again!
Thanks again!
tool_king
Senior Member
John you are welcome. If you are looking for anything else just shoot me a email for what you are looking for .
Thanks. I will look for that and let you know. Just joined this forum so forgive me if I don't do like I'm supposed to. Does anyone have any info on this machine? The sticker on the cab has been scratched off so don't know anything ofther than the M/N without the -#
John C.
Senior Member
Oren, send me your email address. I'll send you the diagram that show a Dash 5 electrical. I think the starting and glow plug circuits are about the same.
As Tool_King says there is a fusible link back by the batteries and close to the battery isolator solenoid. somewhere in that area there is also supposed to be a diode. If there is a tag on the wire by the diode it should say D1. You can check them both with an ohm meter. There is also a diode in the cab which should be marked D4. That diode is in the glow plug circuit I mentioned earlier. As I recall it is behind the operator seat and you have to remove the plastic covers that hide the computers. I seem to remember the diodes were towards the seat on the lower right side when you are looking over the back of the seat.
Let us know what you find.
As Tool_King says there is a fusible link back by the batteries and close to the battery isolator solenoid. somewhere in that area there is also supposed to be a diode. If there is a tag on the wire by the diode it should say D1. You can check them both with an ohm meter. There is also a diode in the cab which should be marked D4. That diode is in the glow plug circuit I mentioned earlier. As I recall it is behind the operator seat and you have to remove the plastic covers that hide the computers. I seem to remember the diodes were towards the seat on the lower right side when you are looking over the back of the seat.
Let us know what you find.
excavator
Senior Member
The fuses ( there will be 2) you are looking for are in a black housing, one end is connected directly to the battery relay. Open it up and there is a large (40 or 60 amp) fuse in there. Is the cab blue or grey? The dash 2 was grey and the dash 3 was blue. Another way to check between the two is to pull the cover off behind the seat, should be 4 phillips head screws. If there is only one controller it's a dash 2, if there are two controllers, one on top of the other, it's a dash 3.
To all trying to help. I have looked for fuse/link/breaker etc.. If they are there I don't see them. I have some pic if someone can tell me how to post them. Oren