well the past couple months when i go to turn the truck on and warm the glow plugs up in this northern BC cold winter the glow plug wiring from the battery to the heavy wires seams to wine real loud, but they still work, any one know what this could be?

 

U dont have glow plugs

 

Beats me why the grid heater circuits sing, mine do that sometimes too. Maybe one of the electrical gurus has an idea. Jim?

 

mine's done that from the time I bought it, I assumed it was a normal thing...

 

UHHHHH.....glow plugs?????? Cummins never had 'em.

 

I have not noticed mine doing it. Do you supose the "grid" is vibrating while it warms up?

 

Mine hums too, and I never thought about it, but when it is all DC there should not be a humming. Maybe it is the relay acting like a buzzer(?)

As mentioned we have grid heaters that heat the intake air, not glow plugs which are found mainly in the prechambers of IDI engines.

JP.

 

Maybe a bad connection in the cable, do a voltage drop test between the (+) battery terminal and the solenoids.

You want to check from one end of the cable to the other terminal to terminal and see what reading you get.

It shouldn't be too much. Also you can check the solenoids, they might have burned contacts and you are hearing them arc.

When you are drawing heavy currents through a cable they can make noise because of the magnetic field that is being produced.

This is why an Induction Ammeter works the way it does.

If you do not have one of these it is a good diagnostic tool to have, I have a few tricks on using them.

When anything heats up by way of a current passing through it does not do it peacefully, the element is expanding, creaking and contorting itself as it heats up.

Jim

http://globalepower.com/Datasheets/Hoyt/Induction.pdf

http://buy1.snapon.com/catalog/item....re&dir=catalog

 

Mine is more of a whine, not a pop, creak, or groan. pretty high pitched, adn like I said, it's been there the whole 74K that I've had the truck.

 

mine does the same thing dont worry about it

 

I've had 10 firstgens and every one has done this.

 

ohh ok, it jsut seams odd gthat all of a sudden they do it, but thanks again guys! now i dont gotta think it will burn to the ground because of a short from that haah

 

My first one did this a time or two. As far as the crew cab, with the awesome wiring done by the previous owner, I only heard them work a time or two.