I'm an idiot!!! - Fermont MEP-802A 5kW

[loosegravel]

It’s been my experience that the gauge on these units is what usually fails, probably from excessive vibration. If you can verify that the wiring to the gauge is correct, and that you’re getting power to the gauge when S1 is turned on, AND the wire from the gauge to the sender has continuity then do the open circuit test and the ground test.

 

[loosegravel]

I just took a look at the schematics. MT7 is the oil pressure gauge sending unit. M7 is the actual gauge. The single wire number that you're looking for at the gauge is 130B, at the sending unit its 130A. There's a terminal board or two in between the gauge and the sender.

 

[Guyfang]

Where is that sending unit for the oil pressure gauge located? The diagram on the inside of the door does not really show anything, and there's no photos on the TM.

4X4, Please stop posting the same question in more than one thread.

 

[4x4nutz]

Anyone have a part number or maybe even a link to purchase the fuse holder for the 803A 10K (FU1)????

 

[kloppk]

The original fuse holder is about $100!
I'd suggest finding one rated for similar voltage and current capacity. They are much cheaper. Be sure what you pick can handle the current.

 

[Light in the Dark]

I have some black versions of it in stock new, you would just need to solder new wires to it (it has tabs, just like the OEM). If you were interested.

 

[4x4nutz]

I have some black versions of it in stock new, you would just need to solder new wires to it (it has tabs, just like the OEM). If you were interested.

Heck yeah! I am Texas Humvee on facebook. I can contact you through FB, or call you if you like.

The original fuse holder is about $100!
I'd suggest finding one rated for similar voltage and current capacity. They are much cheaper. Be sure what you pick can handle the current.

It's a 30amp.

 

[Light in the Dark]

https://www.mouser.com/ProductDetail/504-BK-HKP-R

https://www.mouser.com/ProductDetail/504-BK-ABC-30-R

 

[4x4nutz]

https://www.mouser.com/ProductDetail/504-BK-HKP-R

https://www.mouser.com/ProductDetail/504-BK-ABC-30-R

Awesome...thank you..

 

[Light in the Dark]

No problem. Can't even ship the parts to you, for what Mouser lists them for. Hopefully you are operational soon.

 

[4x4nutz]

No problem. Can't even ship the parts to you, for what Mouser lists them for. Hopefully you are operational soon.

Everything checks out on the new 803A 10K. The fuel pump works when I try and start it, but it won't turn over (and gauges are not working), so I am hoping this fixes it for me. Just the top of the fuse holder and the fuse were missing, but I'll just replace the entire thing.

 

[Light in the Dark]

Does it spin by the dead crank switch?

 

[4x4nutz]

Does it spin by the dead crank switch?

No...but it clicks fairly loud just as it does when I attempt to start it from the front.

 

[Light in the Dark]

If you were impatient you could always make a quick jumper cable with alligator clips to jump the two pins together to see if it fires. I wouldn't... but you could.

 

[Ray70]

Sorry to say, but replacing that fuse holder isn't going to fix your issue. That fuse controls ONLY the alternator.
Sounds like you have power at the control panel, otherwise nothing would be clicking when you turn the switch.
Have you already verified that the motor spins from the fan or pulley bolt?

 

[rickf]

And that the starter is good? Check wire connections at starter. Solenoid to starter motor.

 

[Light in the Dark]

Any progress?

 

[4x4nutz]

Any progress?

I got the 802a running great after replacing the fuse. I can jump start the 803a (10K) and it sounds super quiet and looks new, but it won't start at the switch.

 

[Guyfang]

Try opening the -24 TM, and look at the troubleshooting diagram. You are creating a problem here. Working on two gen sets in the same thread. No one, not even you, can keep track of what is what now.

 

[4x4nutz]

Try opening the -24 TM, and look at the troubleshooting diagram. You are creating a problem here. Working on two gen sets in the same thread. No one, not even you, can keep track of what is what now.

Lol...802A has been repaired and is in good working order since two months ago. The 803a runs great, just have to jump start it every time. I read the TM, work on the 803s until I'm frustrated, and take a day off, and then go at it again. I'm old, half blind, and somehow managed to carry a bad case of ADD with me from when I was a kid, so learning anything is time consuming.