2020 Cummins IKE pull

CaLBaR wrote:

4x4ord wrote:
With the Ford the brake lights only come while the wheel brakes are applied. The Ram is probably the same.

In my owners manual it states that the brake lights come on when the exhaust brake is active letting other drivers know that you are slowing down.

Rob

That's interesting but I think it is likely wrong. On my truck the brake lights only come on when the wheel brakes are applied .... when descending a grade at night I can see the brake light reflection off my trailer and the brake lights only come on when the wheel brakes are being activated. Even without the EB turned on and without a trailer hooked up, my truck will activate the wheel brakes going down a steep hill if cruise is set and the truck is wanting to accelerate down the hill. When the computer activates the wheel brakes the brake lights illuminate.


Edit: In the video we can be sure that the EB was on while that Ram was going down the hill and we can see the brake lights were not illuminated.

IdaD wrote:

ShinerBock wrote:
And it is not a theory that Mr truck has been wrong before.

Yeah, he's consistently grabbing vests that are about three sizes too small.

That was great I did LOL at that one!

4x4ord wrote:
With the Ford the brake lights only come while the wheel brakes are applied. The Ram is probably the same.

In my owners manual it states that the brake lights come on when the exhaust brake is active letting other drivers know that you are slowing down.

Rob

Next time I tow I will experiment with cruise and "AUTO" as I have always used "FULL" EB.

Someone please tell me where the engine was turning 3,500RPM descending the grade???

The "SOUND" of that truck is EXACTLY what mine sounds like coming down a steep grade WITH the EB on. That is NOT just the engine, the fact is when descending grade without the EB on the engine is very quiet in comparison. That was the EB "RUMBLE".

My gauge goes up to 230 braking HP.

I guarantee the EB did not turn off, it simply restricted more or less as needed.

"Just as a reminder that the previous 2020 Ram and GM trucks Ike pull had 2 brake applications with less weight. With 30k lbs the GM had more brake applications but the Ram had less."

GrassHopper, they did NOT have cruise control set on the last test you mention. For years I have said how **** well my EB brake works when the Cruize is set, now yalol know whatz I'm talkin aboot!

I repeat i have decelerated down miles of 14% locked in second at 33k combined holding 35mph. I would say they have improved keeping the truck at the selected speed. to do what I did I was holding cruise at 30mph or so.

jaycocamprs wrote:

4x4ord wrote:
I went back and watched the 4:00 minute mark of that video. I wonder why the gauge reads up to 240 reverse horsepower a while then drops off to 0? It almost seems as though the gauge starts reading at about 37 mph and it pulls it down to 35 mph then quits displaying. Could it be that while the gauge is displaying a number the wheel brakes are being applied.

240 reverse HP would definitely be slowing the truck. 175 reverse HP at the crankshaft should be enough to hold speed on the steepest part of the hill.

At the 4:00 mark, there is a red light on just over the "D". It goes out just before the -hp drops off to zero At the 6:01 mark it also shows -240 hp of braking, but no red light over the "D". Could the red light mean service brakes are applied?

That red light is a reflection of of the speedometer needle.

With the Ford the brake lights only come while the wheel brakes are applied. The Ram is probably the same.