What are these wires and capacitor?!?!?

[Chuckanut]

On the back of the engine these two large gauge wires that come from each detection out of the harness and come to a connector with a capacitor............what is it, what’s supposed to be there ,and what’s it for.
Thanks for the help.

 

[juanprado]

What engine / truck is this for?

 

[Chuckanut]

What engine / truck is this for?

1986 m1026 6.2

 

[M35fan]

Hi and welcome to Steel Soldiers! I'm not sure what that capacitor is for, but you might get more answers if you post your question in the CUCV forum.

CUCV

M1008, M1009, M1010, M1028, etc...

www.steelsoldiers.com

Good luck with your search.

 

[JoeJoe_91]

That’s 1 of 2 Diodes that go to the alternator, the other one is located above the heater core behind the glove box.

 

[JoeJoe_91]

My bad, it’s a lil more to the left of the glove box. I’d just tape it up and leave it if it’s not broken. I forgot what the connector it’s attached to even went to, original fuel filter or something. I just cut all the other wires on mine since the connector isn’t hooked up to anything, I left the diode alone though. I’ll probably just shorten the length of the cord and tape it up when I wire it to my new fuse box. It’s a cluster **** at the moment, waiting on the fuse box.

 

[JoeJoe_91]

On a side note though, might wanna keep an eye on that fire hazard you still have hooked up (24v to 12v resistor). Most people get rid of it and hook the wire from the glow plug solenoid straight to the 12v distribution block, and some run a new wire from the GP solenoid straight to the battery with some type of breaker about 13” from the battery. I caught mine in the nick of time, one of the eye lugs connecting to the resistor was rusted in half about to fall off at any moment, I never would have known because you can’t see behind it without taking it off the firewall. Just a tip, in case you haven’t had the truck long.

 

[dougco1]

On a side note though, might wanna keep an eye on that fire hazard you still have hooked up (24v to 12v resistor). Most people get rid of it and hook the wire from the glow plug solenoid straight to the 12v distribution block, and some run a new wire from the GP solenoid straight to the battery with some type of breaker about 13” from the battery. I caught mine in the nick of time, one of the eye lugs connecting to the resistor was rusted in half about to fall off at any moment, I never would have known because you can’t see behind it without taking it off the firewall. Just a tip, in case you haven’t had the truck long.

Never new of or heard of a fire hazard from the OEM 24v to 12v resister. Both my trucks are still hooked up stock and I still sleep soundly at knight.

 

[MarcusOReallyus]

On a side note though, might wanna keep an eye on that fire hazard you still have hooked up (24v to 12v resistor).

Stop spreading disinformation. It's not a fire hazard. Poor connections are fire hazards.

If you have a legitimate reason for bypassing the GP resistor, state your reasons without inflammatory and false statements.

 

[MarcusOReallyus]

Chuckanut, there's a good description of these diodes (and the capacitors that are sprinkled around the truck) in the "Helpful Threads" sticky at the top of the CUCV forum. Good stuff, you should read it. There are a few known problems that can be caused by them. The diodes and capacitors are there to suppress radio noise. Unless you are planning on spending time monitoring the battalion admin frequency, you probably don't need them.

 

[Keith_J]

The diodes are used to block reverse current, nothing more. They allow the 24 volt system to live with the 12 volt side.

The one in question is for the water in fuel solenoid on the fuel filter. Circuit 930, purple with white stripe.

 

[JoeJoe_91]

Duly noted, my apologies!! I was only trying to help him real quick, I wasn’t too far off about the diode and I was told by one of y’all well known members about the resistor back when I got the truck. I’m not completely wrong though, he should at least take it off the firewall to check the wiring. I will not post comments on anything I don’t know anymore, I just didn’t want everyone to tell him to go to the TMs or Sticky’s. Sorry for the F word, and the misleading information!!!

 

[ke6rwj]

You can have trouble jumping from the nato slave and low glow plug voltage if you bypass the resistors. They are there so the glow plugs can get a good burn when jumping from slave.