Dispatcher7
Member
- 30
- 24
- 8
- Location
- Pittstown, NY
Someplace on this site I had found the electrical schematics for the M1009, I can not find them again. If you have a link to them to share I would appreciate it.
The truck starts and runs fine. Well it starts when it's warm. While checking the glow plugs I discovered the batteries are connected in series. The + terminal on the front battery is connected to the - terminal on the rear battery. The - on the front battery goes to the - bus bar on the fire wall. The - on the rear battery then has a smaller cable going to a solenoid looking device on the firewall just left of the master cylinder and the + of the rear battery goes to the 24v bus bar. I do not believe this is the way it should be, is it?
I can also tell you that the volt gauge on the right side of the instrument panel does not work. And neither GEN light comes on when the key is turned on. Ive been reading a lot of post on here and if I understand things correctly if the GEN light does not come on it could be the alternator, the wire harness or the bulb. But before I dive too far into this Im curious about the above battery questions and if maybe someone did a half ass 12v conversion.
Now back to the glow plugs. I do have voltage to the plugs. Unfortunately my multi meter is not working so I don't know how many volts and could not measure the resistance on the GP's. I'll get a new meter later this week to finish those test. I did see that the GP's have a sort wire coming from the GP to the factor GP wire and the GP terminal is wider than the OE plug. I assume someone installed non military GP's and did this to overcome the different terminal width. I have also noticed the WAIT TO START light does stay on a lot longer when its colder out and does not cycle on/off/on. I've read so much on here my mind is boggled. Do the military trucks cycle on/off/on or was that just the civilian systems? Somewhere I read that if they do not cycle and are supposed to it indicates a problem with the control board. But I believe the longer WAIT when colder is correct.
Oh and one other question. Smack dab in the center of the firewall right behind the air cleaner is a large metal bracket with something mounted behind it. I can see where some large wires possibly battery cables have been cut off from whatever is behind this bracket. Before I go and take this off to see what is behind there can anyone tell me what to expect?
Thanks for anything you can offer.
The truck starts and runs fine. Well it starts when it's warm. While checking the glow plugs I discovered the batteries are connected in series. The + terminal on the front battery is connected to the - terminal on the rear battery. The - on the front battery goes to the - bus bar on the fire wall. The - on the rear battery then has a smaller cable going to a solenoid looking device on the firewall just left of the master cylinder and the + of the rear battery goes to the 24v bus bar. I do not believe this is the way it should be, is it?
I can also tell you that the volt gauge on the right side of the instrument panel does not work. And neither GEN light comes on when the key is turned on. Ive been reading a lot of post on here and if I understand things correctly if the GEN light does not come on it could be the alternator, the wire harness or the bulb. But before I dive too far into this Im curious about the above battery questions and if maybe someone did a half ass 12v conversion.
Now back to the glow plugs. I do have voltage to the plugs. Unfortunately my multi meter is not working so I don't know how many volts and could not measure the resistance on the GP's. I'll get a new meter later this week to finish those test. I did see that the GP's have a sort wire coming from the GP to the factor GP wire and the GP terminal is wider than the OE plug. I assume someone installed non military GP's and did this to overcome the different terminal width. I have also noticed the WAIT TO START light does stay on a lot longer when its colder out and does not cycle on/off/on. I've read so much on here my mind is boggled. Do the military trucks cycle on/off/on or was that just the civilian systems? Somewhere I read that if they do not cycle and are supposed to it indicates a problem with the control board. But I believe the longer WAIT when colder is correct.
Oh and one other question. Smack dab in the center of the firewall right behind the air cleaner is a large metal bracket with something mounted behind it. I can see where some large wires possibly battery cables have been cut off from whatever is behind this bracket. Before I go and take this off to see what is behind there can anyone tell me what to expect?
Thanks for anything you can offer.