I’m new here. But saying that I want to pass some info on to members about the 24v apps that should not be overlooked.

 

Cummins does NOT make the apps for our trucks. They don’t even sell them. It’s the responsibility of the oem to make a control apparatus for their engines. Cummins makes engines not control mechanisms.

 

The correct apps for our trucks is the Williams Control (WC) 131973. Holdwell makes the jumper harness to go to the Duetsch connector on the ISB engine harness.
 

The amount of fake ones available online is staggering. If their name isn’t on the sensor or it’s blank it’s counterfeit.

 

So, if you got a “Timbo” it’s just a repackaged WC. He even says it on his website. Good idea though I wish I thought of it. Any oem truck dealership will sell the WC one they’re quite common in older midrange ISB equipped trucks. Not very expensive either.

 

I bought a Timbo years ago before I realized we have a drawer full of them at work. Ugh!

 

Go onto the Cummins store online and put in 3970085 and see what it comes up with. Nothing! Why? Because they don’t make or sell them.

 

If you bought a fake one and it’s working for you then right on! They’re not consistent on their quality.

 

I work for a Kenworth dealership and the number doesn’t even work for us. Be aware.

Edited November 16, 2024Nov 16 by Mace

There had been a new design out for a few years now. It's a non contact moving magnet sensor. No wiper to wear out. Got it at O'Reilly. I wish I could find the receipt for it.

5 hours ago, Mace said:

The amount of fake ones available online is staggering. If their name isn’t on the sensor or it’s blank it’s counterfeit.

 

Just for clarification.  The three photos that you posted of APPS - are they the counterfeit ones, or the good ones?

 

Also, If I am understanding correctly, I can just use my Timbo in the conversion - correct?

 

- John

 

 

 

4 minutes ago, Mace said:

32 minutes ago, Great work! said:

There had been a new design out for a few years now. It's a non contact moving magnet sensor. No wiper to wear out. Got it at O'Reilly. I wish I could find the receipt for it.

I’m sure there is. Anything can be improved upon.

 

I'm just stating what the ISB calls for.

 

 

28 minutes ago, Tractorman said:

 

Just for clarification.  The three photos that you posted of APPS - are they the counterfeit ones, or the good ones?

 

Also, If I am understanding correctly, I can just use my Timbo in the conversion - correct?

 

- John

 

 

Those 3 are knock-offs. Just wanted to show a pic with a Cummins part number to show how crafty they’ve gotten.

 

Just use what you have and you’ll be fine.

Edited November 17, 2024Nov 17 by Mace

Thank you for clearing that up.  Those sellers are rather crafty.

 

I think I am going to proceed with this modification.  Really appreciate your help.

 

- John