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Thanks for your service.

The diesel engine does not create a vacuum like a gas engine does. Sounds like you have a bad vacuum pump. The pump itself should read steady about 25in hg. (not psi). It should not fluctuate. Doesn't make a difference which direction the pump is facing. The TH400 needs a good vacuum to...

Truck gauges get swapped out all the time. No telling if yours are original or not. No maintenance records like aircraft. Is your user ID correct that you are a helicopter mechanic?

And just exactly are we working on? When posting a video, we need some dialog as what we are watching. If no dialog, they moderators have decided that we will just delete the post.

Good looking truck. On SS we want people to load their pictures here and not on an outside source. Here is a thread that covers the how and why. http://www.steelsoldiers.com/showthread.php?59917-How-to-post-pictures-a-tutorial

Welcome from Oklahoma.

Welcome to Steelsoldiers. Be sure to download the free technical manuals for your truck. Also review the Operations Manual to learn how to operate your truck.

Correct on the three items Marcus. Youtube is a great place to learn how to use a multimeter. Voltage and ohms are the two major things most MV users will use.

In the engine compartment Right above the headlight. Sometimes you have to move the radiator overflow bottle.

Usually a bad ground. Spots to look at are the grounds on the radiator support. One on each side. The ground tabs inside the bulb sockets. And the ground wire for th inside wiring harness. It terminates at the 6 legged connector next to the emergency brake.

Great advice SoulBro!!! That is why in the Tech manual Troubleshooting Section it states: "When troubleshooting a malfunction, ensure that both batteries are fully charged". I like to add "And load tested" as a battery can show 12.5v+ but have zero amps for a load. Two tools every MV owner...

maybe it is a loose connection. The gauges are sealed. If you are crafty enough you may be able to open it if needed. Be aware that the leads are live at all times. Disconnect you batteries.

The terminals for the pink and blue wires are just connections for the internal coil. It makes no difference as to which connector you use. The blue wire is aground that is controlled by the GP card. You can leave it installed. I would double check your new switch to make sure it is a "normally...

I guess your bump didn't work.

I guess no one searches

I would consult the Rosscommon Equipment 12v conversion method and try to make your truck like that. Without knowing how the chop doctor did the conversion we are all just guessing.

Rustystud has a source to have them relined.

http://www.steelsoldiers.com/showthread.php?43430-How-to-turbo-a-6-2-using-6-5-parts

The manual doesn't list any torque specs for the oil pan. There is a paragraph in the PMCS section that says to check the oil pan bolts semi-annually and tighten them to 5 ft-lbs. There is a list at the back of the TM 9-2320-289-20 that has general specs Looking thru the 6.2L/6.5L HMMWV...

Was there a radio rack on the drivers side? There may be but I have never seen one.