Good work describing the hows and whys of the cucv glowplug system. I might
also add that with the system in place as it is unmodified, there is the
added benefit of using two batteries to supply the current to that circuit
for added reliablity. I guess that is why you can have junky batteries and
still start up these trucks at 0F.
Andy
----- Original Message -----
From: Julian Burke <julianb@esper.com>
To: Military Vehicles Mailing List <mil-veh@mil-veh.org>
Sent: Friday, November 10, 2000 4:15 PM
Subject: [MV] CUCV Globar Resistor
> Emmett Thompson asked:
>
> "Why did GM take the glow plug power off the voltage dropping resistor?
Why
> not just take 12 vdc off the normal vehicle wiring?"
>
> Well, Let me get out my "wash and wear" answer for this as I have written
> many articles on this very subject and about 3 weeks later it is asked
> again!
>
> GM didn't take the wire off of the resistor, it is an "in shop"
modification
> that enhances starting the vehicle through stability of the 12 volts to
the
> glowplug network. The resistor is to drop the 24 volts to 12 volts to the
> glow plugs. The glow plugs use 12 Volts and 24 would be too much across
> them. Now, here is why the resistor is used: All M series vehicles use a
> NATO slave plug to jump/slave another vehicle. If the batteries are stone
> dead in a CUCV, 24 volts will still feed the glow plug circuit and it will
> start when slaved in its' original unmodified condition. However, this
> should be noted that through the modification the vehicle will start
easier
> BUT if your CUCV batteries are stone dead when slaved, you will NOT get 12
> volts to the glow plug circuit because the dead batteries will drop the
> entire 24 volts to the center of the two batteries until they charge.
This
> must be kept in mind when jumping off the vehicle with the modification as
> it will not start through the slave recepticle until the batteries charge
up
> to some degree. The modification is to remove the red wire from the
> output of the glowbar resistor and connect it directly to the 12 volt buss
> directly above the glowplug relay. The terminal fits perfectly and the
wire
> is the right length which makes a nice job. I hope this answers this
> question again. Your jeep nut, Julian Burke
>
>
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This archive was generated by hypermail 2b29 : Sun Dec 03 2000 - 20:29:50 PST