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m1009 cranks, white smoke from exhaust, no start

huss691981

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86 m1009 cranks but dose not start. When cranking you get white smoke from tail pipes, the wait to start light stays on for a long time, like 30 sec. the gp solenoid on the firewall does click. When checking voltage, the in line on the soelnoid on the fire wall clicks but it does not fire up. what voltages should I have on the line in side of the soelinoid and the out line side when the key is on. Thanks, Mike
 

huss691981

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Momence IL
Ok thanks, so on the input side of the solenoid i should have 24v and then with the key on I should have 12v on the load side? right? The strange thing is it will start fine for a day or 2 then it wont work for a day or 2.
 

Warthog

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The voltage will depend on if your truck is stock or has been modified

The stock system is wired so that any NATO truck can jump start the truck in a battle situation.

The system feeds 24v into the resistor pack on the back of the firewall. When the GP system is not engaged you will read 24v at the input terminal of the GP relay.

The resistor pack comes into play when the GP relay is engaged. When everything is working correctly, The GP relay engages, 24v is sent thru the resistor pack, GP relay and on to the glowplugs.

With the resistance of the resistor pack and the glow plugs, the voltage will drop from 24v to around 12v. You will see12v on both sides of the relay. And each glow plug will now see 12v. That is assuming all the glow plugs are working properly.

If one of the glow plugs goes bad, the total resistance drops and allows a little more voltage to the others. If two plugs go bad the even more voltage is supplied to the rest. As the plugs fail, the voltage keeps increasing until the last "good" plug will see the entire 24v and will die a very painful death.

So without knowing how your truck is wired, stock or modified, we have no idea what voltage you should be seeing.

Some members will bypass the resistor pack so GP failure will not be an issue

http://www.steelsoldiers.com/showthread.php?121398-GP-Resistor-Bank-Bypass
 
Last edited:

swiss

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Another thread that every CUCV owner should read courtesy of Warthog the Emperor of CUCV electrical operations.

All Hail Warthog :)
 
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