Factory brake controller

[PBJ2500CTD]

Yep, that's varies on what inputs the brake controller is seeing and processing. Minimum start, end is max. In between is all controlled by the logic.

Earl

Or some "ill"logic as determined in this thread.

 

[Wiredawg]

first night away from mom and brother and sisters. Sharp little teeth too. Cleo(patra)

 

[PBJ2500CTD]

first night away from mom and brother and sisters. Sharp little teeth too. Cleo(patra)

Cleo's asp? Li'l Fang.

 

[EZeis]

Or some "ill"logic as determined in this thread.

Could be, my middle school computer teacher always said, garbage in, garbage out when it comes to computer programming/logic. Lol

Earl

Edited it, phone put garage instead of garbage. Lol

 

[Wiredawg]

Y'all do recall the ITBM parts numbers are the same for 1500 through 5500. Now, only our FCA tech TDR members know on the program. Is this just toggled on and off and the "logic" resides in the ITBM? Or different programs?

I guess we could prove this by videoing the the tests. And I have two mules.

Reattack: I was the recorder on the tests, so the logic would be the rate of movement on the meters both up and down, right? They looked to be about the same rate. Just my observation.

Cheers,

Ron

 

[PBJ2500CTD]

Could be, my middle school computer teacher always said, garage in, garage out when it comes to computer programming/logic. Lol

Earl

The computers I learned on were racks of stringed beads...

 

[gsbrockman]

We got a new Lab puppy today, so a little distracted.

View attachment 113188

Meet Ol’ Yeller......a slightly different kinda dog....that is not really dogish at all....got it about three weeks ago for the daughter.

 

[SnoKing]

Don't forget the scheduled voltage from 0 to MAX. That is done by an algorithm or circuit(s) to determine the amount/rate of voltage required in a given scenario.

I think the voltage is always the same battery voltage. The pulse width is what they vary. Some lighting circuits are now controlled the same way with PWM. When you dim the dash lights you are changing the PW of the power applied to the lights.

 

[gsbrockman]

I think the voltage is always the same battery voltage. The pulse width is what they vary. Some lighting circuits are now controlled the same way with PWM. When you dim the dash lights you are changing the PW of the power applied to the lights.

I’ll actually concur with you regarding PWM and lighting......

Over on CF, different guys have started running relatively inexpensive LED’s and HID’s in the headlights and fog lights of RAM trucks without having to purchase these waaaaay overpriced ballasts and resistors, thanks to Alfa OBD and the ability to change lighting settings.

 

[RVTRKN]

We got a new Lab puppy today, so a little distracted.

View attachment 113188

So, I agree. I tested the 1500 and 5500 with their ITBMs set on EH level 10 with the same tester. The trucks don't know what weight the trailer is, we have to tell it. I believe the 1500 ITMB is setting brakes stronger than the 5500. To me the evidence points to they have the same programming and controllers, or at least the 1500 may have different programming, but equally possible is normal variation of the same systems.

Happy to entertain further agreement and disagreement with supported evidence.

Cheers, Ron

Cute puppy, better hide anything chewable, Lab puppies are famous for that.

 

[PBJ2500CTD]

I think the voltage is always the same battery voltage. The pulse width is what they vary. Some lighting circuits are now controlled the same way with PWM. When you dim the dash lights you are changing the PW of the power applied to the lights.

Yes. I'm not sure if they cap the voltage at 12vdc or if it is system running voltage, but the varying pulse width (duty cycle) is what varies the output voltage, which controls the current, determined by circuit resistance.

The average value of a PWM square wave is the peak value of the square wave multiplied by the duty cycle. This means that the duty cycle and the DC-output are proportional, and the output will increase linearly with respect to the duty cycle.
​

 

[Cummins12V98]

I tow 60 even double tow in CA. No issue with the Patrolmen.

 

[SnoKing]

I tow 60 even double tow in CA. No issue with the Patrolmen.

I run with the semi trucks which most seem to run 59-60, never a problem. I think it is kind of crazy that a short wheel base tall single screw box truck can run with the cars. But hey, it is California! SnoKing

 

[Wiredawg]

The computers I learned on were racks of stringed beads...

I had something worse, a Zenith 100. With Peach Text and Peach Calc software. Screen had terrible green burning. Great desk paperweight.

Ron

 

[gsbrockman]

I had something worse, a Zenith 100. With Peach Text and Peach Calc software. Screen had terrible green burning. Great desk paperweight.

Ron

But did you learn and use CoBOL and utilize 80 column punch cards?

 

[RVTRKN]

I tow 60 even double tow in CA. No issue with the Patrolmen.

Ya, they do tend to ignore you when towing over 55 mph. I was towing boat in signature at 70 mph, when a CHP I didn't see, just passed me up. This was in the middle of Mojave desert though, he must have been alerted to donuts at the field office.

 

[Wiredawg]

But did you learn and use CoBOL and utilize 80 column punch cards?

I learned programming related to automated manufacturing using punch cards, but I was telephone and data systems tech. Worked with Sperry and Unisys field engineers.

It was a fun time serving in the Cold War. Things keep on the way they are, we might have Cold War II.

Cheers, Ron

 

[SnoKing]

I learned programming related to automated manufacturing using punch cards, but I was telephone and data systems tech. Worked with Sperry and Unisys field engineers.

It was a fun time serving in the Cold War. Things keep on the way they are, we might have Cold War II.

Cheers, Ron

More likely it will be WWIII.

Eisenhower's Farewell Speech and the military industrial complex.

http://avalon.law.yale.edu/20th_century/eisenhower001.asp

We are now busy forming excuses to start a war with Iran.

 

[PBJ2500CTD]

But did you learn and use CoBOL and utilize 80 column punch cards?

Nothing more exciting than watching a key punch person stepping out the door and tripping with a couple trays of freshly punched cards of your urgent program...

 

[GCroyle]

Joe,

You ever get this sorted out?

Gary