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swathdiver

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I just posted the diagram, I don't know how to read them! LOL I think that's the one but don't know what all them squiggly lines mean.
 

kbuskill

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148976311



148976314

I am not sure what everyone else sees but at first I saw a wiring diagram BUT when I clicked on it to open it in a bigger window it has now changed to showing how to remove ball joints.

That is freaking nuts... every time I edit this post it changes the image to something new.... lol
 

kbuskill

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So I think we have an answer...


As the factory installed heated washer unit the AT-37GM Heated Wash operates in “Automatic” mode.

The unit starts to operate when the ignition is on (engine running) and the unit’s control switch is pressed. Once the unit is
activated it heats the washer fluid inside a self contained heating chamber for approximately 30 seconds and then
automatically provides 4 consecutive sprays of heated fluid in conjunction with the windshield wipers. There is
approximately 10-20 seconds between each spray (depending on outside temperature). The AT-37GM will shut down
automatically after the completion of 4 sprays, or if the driver pushes the control switch during the cycle.

This unit is a direct replacement for GM vehicles with original attachment and OEM connectors.
 

iamdub

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All of these ideas are great if we only new the factory workings of this switch.

I assume the switched circuit has a timer of some sort built into it to turn off after a given period of time.

What I am not sure of is :

1. How long is that period of time?

2. If you turn it on can you turn it off by pressing the button again or do you have to wait the allotted time?

3. Does this cause your wipers to come on and spray fluid on your windshield automatically?

We need more info from someone with a functional washer fluid heater.

Found this site: http://alphathermusa.com/heatedwash-AT-37GM.html

They give details on how it functions, but not so much the switch's function. I may end up ordering one since it's a plug-and-play solution to restoring this feature. Apparently, hot water washes off bugs better than ambient temp water. I don't know why they can't just make an aluminum washer reservoir that doubles as an exhaust manifold heat shield- free heated washer fluid!
 

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So I think we have an answer...


As the factory installed heated washer unit the AT-37GM Heated Wash operates in “Automatic” mode.

The unit starts to operate when the ignition is on (engine running) and the unit’s control switch is pressed. Once the unit is
activated it heats the washer fluid inside a self contained heating chamber for approximately 30 seconds and then
automatically provides 4 consecutive sprays of heated fluid in conjunction with the windshield wipers. There is
approximately 10-20 seconds between each spray (depending on outside temperature). The AT-37GM will shut down
automatically after the completion of 4 sprays, or if the driver pushes the control switch during the cycle.

This unit is a direct replacement for GM vehicles with original attachment and OEM connectors.


LOL

Apparently, we were both on that site at the same time.
 
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swathdiver

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I don't know why the pictures left and keep changing to something else. I just copied and pasted them. Send me an email if you want them.
 

kbuskill

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I don't know why the pictures left and keep changing to something else. I just copied and pasted them. Send me an email if you want them.

Ok... so here is a site with the low down on how to repurpose the heated washer switch:

https://www.the12volt.com/installbay/forum_posts.asp?tid=135653

I guess the switch is a momentary switch and needs a latching relay in order to hook it to anything you want to stay on.

OR if you wanted to hook up train horns you would be set... lol
 

kbuskill

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After considering what this switch could be used for in its current iteration (momentary switch) I think it would be cool to use it to pop the rear hatch glass.

That is the one feature I was surprised this vehicle didn't have. It has a switch to open the whole hatch but nothing inside to pop just the glass.

The only thing that sucks about this idea is that I would have to run a wire from the actuator all the way to the front of the truck. Not a big deal just more hassle than what it may be worth.

Anyway just a thought... why don't some of you post up your ideas for what you would use this switch for.

Originally I was thinking of using it to power my new 42" LED light bar that I will be installing behind the grill and I still may use it for that.
 
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swathdiver

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3 days since last refuel and 14.5 mpg now. Babying it, not revving past 2,500 rpms mostly, running the speed limit. Staying away from idling situations and heavy traffic. Tires at 41 psi cold. BFG says to put them at 50 psi. Keep forgetting to do the chalk test, but keep forgetting where I put the chalk!
 
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swathdiver

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To 14.9 mpg this afternoon, 125 or so miles since refueling. Always remote start from cold and today got in only a few minutes after it started running, the CEL came on soon after, same old right side cat (P0430). Hooked the Tech2 upon returning home and cleared the code and reset fuel and fuel pump trims to zero then went for a drive. The Long Term Trims are around 1.0 so that means slightly lean. Upon reflection, it seems this driving off while the motor has yet to reach operating temp is the condition for triggering the code.

It's finally cool out now, time to find time to get some things done on this truck.

Going to have to deal with that cat sooner or later. First comes the oil change, plugs and wires and grease gun to the chassis and grease the splines on the propellers as GM calls them and check the u-joints. Have the Gruven parts for the mirrors and new interior door handles and engine oil cooler lines and probably some other things collecting dust under the work bench.
 

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3 days since last refuel and 14.5 mpg now. Babying it, not revving past 2,500 rpms mostly, running the speed limit. Staying away from idling situations and heavy traffic. Tires at 41 psi cold. BFG says to put them at 50 psi. Keep forgetting to do the chalk test, but keep forgetting where I put the chalk!

The sidewall says 50psi or does BFG specify 50psi for that tire on your particular vehicle?
 
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swathdiver

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I spoke with someone at BFG about my vehicle and those specific tires. On the 2500s the front pressure for an LT tire is recommended at 50 psi and the rears 60 psi.

I was trying to keep them as low as possible to give as nice a ride as possible without wearing them out prematurely. I ran them at 30 psi and it was smooth as butter but the load rating at that psi doesn't even support the truck empty, let alone each axle and the whole thing fully loaded. 41 psi was calculated to support the GVWR and the GRAWR but the lady at BFG insisted on sticking with 50 psi which is more than enough.

I still haven't done the chalk test, two weeks with the flu and the aftermath am dealing with still. It was a major milestone just to get to the store and buy a new Lucas grease gun, even with help from my bride. Was supposed to do all this stuff today but the kids are off to church for an event so maybe later or some other day again. Too weak to work on it by myself.
 

iamdub

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I spoke with someone at BFG about my vehicle and those specific tires. On the 2500s the front pressure for an LT tire is recommended at 50 psi and the rears 60 psi.

I was trying to keep them as low as possible to give as nice a ride as possible without wearing them out prematurely. I ran them at 30 psi and it was smooth as butter but the load rating at that psi doesn't even support the truck empty, let alone each axle and the whole thing fully loaded. 41 psi was calculated to support the GVWR and the GRAWR but the lady at BFG insisted on sticking with 50 psi which is more than enough.

I still haven't done the chalk test, two weeks with the flu and the aftermath am dealing with still. It was a major milestone just to get to the store and buy a new Lucas grease gun, even with help from my bride. Was supposed to do all this stuff today but the kids are off to church for an event so maybe later or some other day again. Too weak to work on it by myself.


Props to you for understanding the tire manufacturer's psi rating on the sidewall versus your vehicle's pressure recommendations. :waytogo: So many people think that any pressure under the maximum PSI listed on the sidewall means that the tire isn't "full" and is being ran "low", regardless of what that tire is on.

I find that the chalk test isn't accurate enough for me, but I tend to geek out on details.:oops: The difference between under-inflated and over-inflated is too wide of a range to be seen due to the available resolution of chalk on concrete. You have to have fine-quality chalk (maybe a pool cue chalk?) and super smooth concrete. Even then there are other factors. I just compare the tread wear when I rotate the tires. I'd like to see your results if you ever get around to doing it.

Rest up and get well.
 

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^ good advice on the chalk.
ive tried other chalk & it didnt work out too well.

i prefer to use a playing card -
on warm tires, inflate w/ air until you can slip a playing card under tire to edge of 1st lug. then slowly deflate tire until card drags on removal (if you cant remove card, you deflated too much)

has worked well for me & when rotating tires, they all look good.
 
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swathdiver

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Thanks! I was in the tire business for few years and got good training, drag racing didn't hurt either, adding much to the knowledge base.

The tires have worn 2/32 since new and evenly across the whole tread on all four. So there's no sign of over-inflation or under-inflation even though I've been running them mostly in the 30s for the majority of the time. For the past month or so they've been at 41 psi cold. The weather has changed so they'll need checking again.
 
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swathdiver

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Finally had the opportunity to change the oil today. The monitor said 22% life left and it has been around 7k since we did it in June. Ran the long filter and we used a K&N with the 1" nut welded to the end to make removing it easier on the kids. I forget how much engines love clean oil, it sure drove different. I think I'll start changing it at 50% from now on. I know the later trucks do not let it run past 7500 miles. As always we're running Mobil One synthetic.

As that was getting done we broke out our new fancy Lucas grease gun with a tube of Red-N-Tacky or something like that and prepared to start at the front and work our way aft. Well, this ain't no NBS or NNBS 2500, we found two zerks, one for each tie rod end! What a let down! I was getting ready to pull the drive shafts too and grease the splines. 2 Zerks for the NNBS GMT900.

As for mileage, well after another couple of 1 hour idling sessions it's down to 13.0 mpg.

Cooler weather has arrived and it has stopped raining! We'll be eating marshmallows around the fire pit tomorrow night.
 

iamdub

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I disregard the OLM and change mine every 5,000 as it's "close enough" to what the oil is probably good for and it coincides with my 5,000-mile tire rotation schedule. I could do both at 6,000 miles, but then I'd have to get fancy with the math and I like seeing even numbers on my windshield sticker- 175K, 180K, 185K... It's just one of those things that I have to surrender to my OCD. Anyway, IIRC, I think the OLM is usually right around 50% when I reset it after a service.

My (actually my GF's) average MPG is currently 16.2. Your idling sucks!

That sounds nice. I may break out my fire pit as well if we get a cool snap.
 
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Been waiting all year to use the fire pit again! I love sitting by the fire, whether inside or out. It dropped into the high 60s and was chilly even for the yankees that've been living down here a while. The fire took a while to get going, it had been raining straight for what seemed like two weeks and all the firewood was wet as was the kindling. But with my youngest daughter's help and perseverance we built a nice warm fire with beautiful embers to stare at.

A few hours earlier my sixteen year old and I tackled the rear brakes finally. Pulled off the rear disc and saw that the parking brake shoe and inside of the drum in hat were soaked. Axle seal. Just changed the fluid 7,000 miles ago and all was good. Ordered up some new AC Delco seals and more grape scented rear diff fluid and will make the repair and get it all back together Monday hopefully. The parking brake cables look good, the shoes are wore out and were not adjusted right, not even touching. The discs were rotten and the wrong size too. The inside pads barely touched any of the disc. We've checked and checked and checked and checked again to make sure we bought the right parts.
 

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