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yea if your oil light isn't coming on and the alt isn't dropping of line that sw is not closing. How close it is to a 15PSI activation point and its amount of hysteresis is another story, you would have t take it off and connect it to a regulator and yet another gauge to map its response...

Ok, the larger sender pointing up is the gauge sensor, the smaller sensor lower, aft inboard on the same oil manifold, looks like the 15 psi oil sw that controls the oil light, alt energize and starter lockout… what year is your truck?

Any oil idiot light? Forget if yours is controlled by the ECU or a standalone pressure sw.

Not running them at max governed for hours at a time may have an effect on longevity also:)

so how did that A/C perform under those conditions?

Oh yea, wether it is right or not in the end is your buisness, but it won’t ever get to that stage if the Is are not dotted and the Ts crossed. had an approved set of house plans in hand that I brought back to the engineer for “recommendations” because his end wall roof brace design wasn’t to...

Don’t forget the engineering stamp or it will never get thru permitting…:)

Yep, that is a air system brake check valve… A very nasty one:) That and a capped or plugged red glad-hand was your problem…

Been there, Done that, Qualified to make the call...:)

yea, silly question...:)

It depends on if you are full of fuel or not...:)

of course... Aren't we all?

Well a 12,000 BTU window A/C pulls ~1000W when cooling, and 40A@24V is 960W, so it may be reasonably close to 12KBTU A little anemic for a greenhouse of a cab like is found on the LMTV. Can your alt handle the extra 40+A @24v load? Have seen a few now who have gone the rooftop A/C-inverter...

You can also fit an ex brake to the A0…

The other two 2way checks inboard of the drivers step below the park 2way? those interface the front blue glad-hand to the pri&sec service brakes, so a towing vehicle has control of the towed vehicles brakes… i covered some of the operation in my front glad-hand delete video on utube

you can only have VENTED covers on the front glad-hands! IF YOU HAVE SEALED COVERS ON THE FRONT, that is part of this problem, a leaking check valve(directly below red glad-hand behind bumper) to the wet tank feed would be the other part.

From the park control in the dash, a line runs down to the floor forward of the brake pedal/steering column. If you remove the grill you will see that it runs over to one input port of the top 2way check valve up behind the drivers step. the other input is from the front red glad-hand. The...

The TC in the allison locks in 3rd and above 100% of the time and does all shifts with TC locked. Somewhere in 2nd when downshifting it unlocks the TC. have one person report maintaining ex brake and TC lock when manually shifting down to 2nd until ~10MPH. 3-2 is a large ratio step, and the...

Holy @#$% !

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