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I highly doubt the returns are part of the issue.. Just messy if they leak.

I still think the higher voltage has something to do with digitalizing signals from one processor to another. If the signal is given a value read in volts or milivolts or whatever, it allows for more signals. Along with everything else that can be done with higher voltage, and advances in batteries. It's crazy stuff guys such as ourselves would never think of (or want to) It's kinda amazing some of the things. For one that they can do it.....and why they would continue to make these things so complex. It's true, a 24 volt system worked great for starting a large motor (something us guys would understand) but it's way way more complicated now.

This made me think that

I think it has come down to how well things have been thought out. One big disaster is: backward compatibility. It is like "feedback carburetion" was. Bandaid on top of badaid until the system collapsed. Once Mfg finely came to the conclusion they couldn't meet requirements with what they always had turned to, then and only then did things get better. Once carburetors were abandoned, and FI took over we went from engines lasting 100k to 2x-3x. Engine life wasn't the thing that pushed the change, it was emissions. 24 volt has always been better in higher power use applications. It was why it was used elsewhere for more that 1/2 a century. 32 volt has been used in marine for a long time, 36 less so. 48 has an operating voltage of over 50VDC and is getting well into the area that you solve one issue and create 2 more. 24 volt is far better than 12 for cranking big bore diesels. What kept it out of this part of the world was backward compatibility. A 12 volt trailer would need retrofitting to be towed by a vehicle supplying 24 volt to the trailer. Back in simpler times a nose box and resistors allowed a 12 volt tractor to tow a 6 volt trailer. When designing electronics, it cost a little more (not much) to make the compatible with multiple voltages around the same range, so stuff like ABS, radios Stab control, engine controls etc, could be made future/backward compatible but have not. The last time we went though a voltage switch vehicles were far simpler. Still VW kept 6 volt until the mid 60's, and 6 volt bulbs (including sealed beam headlights) are still readily available more that 50 years after the last car using them were produced.

I just read thier sending more ice agents there so thier signs are not working

1979 ENDT 675 engine. Are the fuel return lines between the injectors anything specific? or can I just use any 1/4inch fuel line? Appears I have one leaking a bit. Could this be part of my fuel problem with the surging and engine occasional miss?

The Granite replacement is in production. They're in the bullpen at Macungie.

I didn't misunderstand one bit. Volvo might be the first to use this setup, but it's what's coming with all of them. You will be surprised to see how much of a truck becomes more and more dependent on new technology. It'll all be proprietary too. If anything these things have become cheaper to manufacturers.....not end users. There's more systems on newer stuff that was never even thought of not that long ago. Colission avoidance driver monitoring.... goes on and on. These trucks are outpacing the casual mechanic in leaps and bounds.

G-Day Mates!!!! I have to agree with this man 100%!!! Thank You Hippy!!! All you have to do is You Tube the music of the late Slim Dusty to realize this commentator is correct. They did not nick name Slim "Mr. Australia" for spreading this kind of BS to the Aussie public.

Seems as though Austrailia has problems similar to us here in the U.S.A. I feel the same as he does.

The Present Pinnacle CHU is part of this VHD Granite/reveal also I believe. May be the end of the Pinnacle as we know it. Mack as we knew it is long gone replaced by Volvo offerings. At least the name is still alive>

You misunderstand me, I wasn't saying it had anything to due with lighting. I only mentioned the lighting in terms of it being the only thing on the buses that WASN'T 24 volt. Voltage has nothing to do with the problems Volvo has created. Some have pushed for higher voltages (Elon!). The higher the voltage the thinner the wire can be for the same "work". It brings other problems like flash over and the need for wider air gap in relays and switches for example. Problems multiply once the actual voltage exceeds 50 VDC, so there is a practical limit on the higher end also. Most problems seam to exist when more than one voltage "system" is used on one vehicle. It come more from implementation (corner cutting) then from the fact there are two (or more)voltages used. Volvo seams to have chosen the route of 24/12 voltage on their trucks to meet an end result, not as the end result. It was their "solution" to implementing some requirement, not the requirement has to be 24 volt.

Going to 24 volts is way more than lights on newer trucks. You're gonna see more stuff being electric on them ( think components like fans and such ) and whatever they are ???? every one of them is going to have it's very own form of ECM. Wouldn't surprise me a bit to see 36 or even 48 volt systems before too long. One thing for sure, there won't be fixing a marker light or some other simple thing with a test light or volt ohm meter like most of us guys are familiar with.

Back when I was bringing "gray market" European buses to meet DOT spec's the only thing that required 12 volt were Sealed Beam headlights. Sealed beam's were required at that time and no 24 volt sealed beams met the DOT required beam pattern. At that time Motorcoaches (MCI, and others) were also 24 volt, andused either a Vanner battery balancer or some solid state DC-DC were just coming on the market. As others have said in many parts of the world 24 volt in commercial vehicles is the norm. The only today keeping it from being is backward comparability with older trailers and equipment. 12 volt cab accessories could easily be handled by a 24-12 DC to DC converter.

Voltage doesn't effect mutiplexing as far as my understanding. That is done with a digital signal, which is why modules have to be "programed" to the vehicle and can not be interchanged at random between similar vehicles. Either way it is the mfg choice of engineering that had led to the problem, not the voltage nor the EPA (24 volt is not mandated). It is never "we have to make a crappy vehicle" it is "we choose to, because it is cheaper and more profitable".

I'd like to have a nurse like that one from Ferris Bueller's Day Off. 😏

TJC, Good luck with your operation. Our prayers will be with you. A urinary infection is bad enough without finding more problems, But at least you appear to have a good Doc that was willing to look you over good.

I think the increase in voltage is more about multiplexing. Wider range of voltage equals more signals that can be sent from processor to processor. So many components now have a module that used to work from an air signal, or some simple form of relay. Way too overcomplicated anymore.

Yes, the men who work on power lines in terrible weather conditions do not get either the pay or the respect they deserve. My house heat system is the same as yours. I have a large Eden Air electric heater, which I can run off my generator, is enough to keep the house warm for short periods of time. Our local Electric Coop is very good at responding to calls quickly. For hurricane and ice storms they preposition trucks all over their system so they can respond better/quicker.

Most motorcoach's here run 24 volt. It isn't about the voltage or the EPA, it is about the mfg implementation of an ill thought out solution to a power issue. This is all on Volvo.

It would not be so much fun to be on BMT if everyone stayed on topic!!!

Swishy my day is off to a great start with your choice of music! A dozen likes! My dad was in a marching band and played both the trombone and sousaphone. So l heard (The Washington Post March) many a time along with other favorites growing up. .....Hippy

Yeah the heated glass and my Mustang works really well. I just turned it on yesterday and it was just morning due. It cleared right up after about 15 and 20 seconds.

The town highway dept's last 2 or 3 Western Star plow trucks have heated windshields. Electric elements in the glass just like a rear window in a car or SUV. As far as l know the drivers really like it. And, 0930 and we just got on the high side of 0*! .....Hippy