New GMC 2500 Wont Engage Trailer Brakes
I have a new 2021 GMC 2500, Diesel. It will not engage trailer brakes unless the brake pedal is mashed to the floor. It is this way on any trailer it’s hooked up to. My 04 Silverado works fine on my t...
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MFL...Thanks for you comments and yup, at 73 and am older than most on this forum, but control logic isn't much different from when was designing controllers decades ago.
Yes, lots of the components are faster, more sensitive, and CHEAPER nowadays, but the logic/truth tables are about the same...albeit with many more variables tossed into the fray by having to integrate with everything.
Why know that some of these issues are founded in the time-outs designed into the logic tables. Also question how 'real-time' these OEM's software is and that is part of the time-outs know is happening in a real-time environment
So which did the designers/architects decide should have a higher order flag? The ABS? The traction control? The IBC? "Real-time" meaning that the computer deals with a high order flag before doing anything in the queue. 1st, 2nd, 3rd, etc flags are dealt with in that order. Then within 1st order flags, there are other hierarchical levels
Akin to the age-old relay race issues of my day.
IMHO, too close to a Rube Goldberg these IBC's. Simplicity of a separate controller appeals to me. If it flakes out, replacement is around $150 bucks and is a plug and play. Vs IBC requiring an engineer to diag properly with tooling that costs in the tens of thousand of bucks. Even then, they resort to replace & cross fingers it works.
IMHO, most folks who didn't like their P2/P3 didn't have them setup well and/or their TV's brake pedal switch isn't as sensitive as GM's, which only takes about <0.03" movement to 'click' on the TV's brake circuit.
Bottom line: found some rust on the roof of my 1996 Suburban, right next to the top windshield edge. Must have had something hit it & compromised the paint/galvanized coating. That might cost more than I'll wish to...but stuck wanting to build a HO 7.4L (miss the C2/L88). Stuff has been chipping away at that, as found out that GearVendors does NOT fit in a 1996 4x4 Suburban because the tranny tail housing is gone & replaced by the Xfr case.
Yes, lots of the components are faster, more sensitive, and CHEAPER nowadays, but the logic/truth tables are about the same...albeit with many more variables tossed into the fray by having to integrate with everything.
Why know that some of these issues are founded in the time-outs designed into the logic tables. Also question how 'real-time' these OEM's software is and that is part of the time-outs know is happening in a real-time environment
So which did the designers/architects decide should have a higher order flag? The ABS? The traction control? The IBC? "Real-time" meaning that the computer deals with a high order flag before doing anything in the queue. 1st, 2nd, 3rd, etc flags are dealt with in that order. Then within 1st order flags, there are other hierarchical levels
Akin to the age-old relay race issues of my day.
IMHO, too close to a Rube Goldberg these IBC's. Simplicity of a separate controller appeals to me. If it flakes out, replacement is around $150 bucks and is a plug and play. Vs IBC requiring an engineer to diag properly with tooling that costs in the tens of thousand of bucks. Even then, they resort to replace & cross fingers it works.
IMHO, most folks who didn't like their P2/P3 didn't have them setup well and/or their TV's brake pedal switch isn't as sensitive as GM's, which only takes about <0.03" movement to 'click' on the TV's brake circuit.
Bottom line: found some rust on the roof of my 1996 Suburban, right next to the top windshield edge. Must have had something hit it & compromised the paint/galvanized coating. That might cost more than I'll wish to...but stuck wanting to build a HO 7.4L (miss the C2/L88). Stuff has been chipping away at that, as found out that GearVendors does NOT fit in a 1996 4x4 Suburban because the tranny tail housing is gone & replaced by the Xfr case.
