My Onboard Air System & Train Horn Install (with Details and Pics)

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

jgruberman

Senior Member
Joined
Oct 17, 2015
Posts
636
Reaction score
147
Ram Year
2015
Engine
EcoDiesel 3.0L
Well I finished my install of an onboard air system with train horns and I feel like I did it really well and took all lot of pics... seemed only appropriate to share it and help others and answer questions... that's why we're all here, right? Feel free to ask questions here or PM me if you'd like... here we go!

Train Horn: Kleinn Train Horns - Train Horn | 4WheelParts.com

Onboard Air System: VIAIR - Medium-Duty Onboard Air System | 4WheelParts.com

I struggled finding the right place to mount the tank but I ended up buying some pretty heavy duty L brackets from Home Depot and attached them to the underside of the passenger side of the truck with #10 1" Self tapping screws. Eventually I used a bolt, washer, the tank, another washer, a locking washer and finally the nut to attach the tank to the brackets. I used one of the bracket holes existing and drilled another for the other side of the tank.

771d29fef3ccb5fc99d7e0ca6005dd3e.jpg

3e1e3e9a103eba88c52429c6a79fbc5b.jpg

0021ae88f883d3b916f67a904d9d42a7.jpg

9217a01f4ccfb9891824f2452ead0353.jpg

I decided to get crafty and use the storage bin under the rear floor mats for the compressor because I couldn't find a good location where it was close to the air tank and safe from a lot of water.

c03989acb9a562ba8b4d10a617da3232.jpg

10315ed0a26a36414e1ed557e05daafe.jpg

However it turns out that the compressor gets a little toasty and more importantly, the plastic bin acts as a sound amplifier and reverberates when the compressor is running and is somewhat uncomfortable when it runs, especially with the windows up and AC on. So the compressor got moved and I ended up using the extension tubing and flipped the compartment around and feeding the extension tubing in so the air filter will still be free from water and mounted the compressor further back on the frame with the same self tapping screws mentioned above. The only thing I may try to change is to add the provided bushings between the compressor and frame in perhaps preventing unnecessary vibration when the compressor is running, but I'm undecided in that... it's already much quieter on the outside. I used a flexi air hose to connect the extra distance and reach the compressor, also from Home Depot.

8b6ba0c4fcbbe30fb0817a6c8453ce85.jpg

d9578112db51ffcb25a516a6e39af1a2.jpg

c40603e1a644b0626faa5d1e4222bc29.jpg

8e44032cf5904b4a6789057b78e3a274.jpg

I used a corner bracket with the self tapping screws again and drilled it into the frame under the front of the truck. Then attached the horns to the bottom side of the corner brace. I didn't like the idea of the horns being too low or in the back because I felt they'd lose effectiveness or get damaged. This is a perfect spot IMO.

884c383e65c32bd9867a7eb81ca45ee4.jpg

0cab382c5cba7a093fe915fb51bc59ed.jpg

I ran a line from the air tank to a quick connect installed in the rear bumper for air tool connection, it's pretty handy to have IMO and pretty easy. I used a Universal connector from Home Depot that will allow automotive and industrial air tools connections.

be9b154e643d720e3f855d3b34f04855.jpg

I installed the 1/4" tubing from the air tank into a brass T connector (from Home Depot). From that T connector, I ran one end to the train horns and the other end around the back of the engine compartment, the same place I ran the power wires. I actually was able to open the clips on the existing wire channel and ran the new wires in there and tucked in the air line. I ran that air line into the cab to the gauge provided in the kit.

bd3a96b1cdb0b9cdd9f17d2b94ecabf4.jpg

54f18ce3124e96f851d7d9ad42203268.jpg

e1ca33119ecc3d32fc87620ad9bb77ca.jpg

0c2eee8818e424b709559ff133aa5b16.jpg

54ed89ea20865d4ea7e9d6460fcdbae0.jpg

Inside the cab now, I connected the gauge(and compressor on/off switch) to the cigarette lighter line under the middle console because it's the easiest accessory line to tap into that I know of. I'm sure there are others but that's where I went. I also wired the momentary switch to on top of the steering column so it was within easy "smack it quick" reach but not going to hit it on accident. It's also wired to the cigarette circuit so when the truck is off, the horn won't work.

cc1101574bdd41ae9b79ba3280d9385d.jpg

Overall, you need some #10x1" self tapping hex head screws, a few good brackets, and some spare wire. I used an impact driver for driving the screws into the frame. The overall project, trial and error for mounting points, trips back and forth to Home Depot.... honestly it probably took me 12 hours but I spent a LOT of time figuring out mounting solutions... here's to hoping that this thread helps you guys get it done faster. Overall, I'm very happy with the horn (haven't used it LEGITIMATELY yet for an idiot on the road, just testing it) and the entire air system. It's nice peace of mind to have the onboard air system. Pick up a tire plug kit from Harbor Freight for 10 bucks and you have your own roadside tire repair service [emoji1]

Good luck!

Sent from my SAMSUNG-SM-G935A using Tapatalk
 
Last edited:

AustinB

Banned
Joined
Sep 8, 2015
Posts
3,942
Reaction score
2,052
Location
San Diego, Left Coast
Ram Year
2015
Engine
hemi 5.7
I didnt read through the whole writeup (its a long good one btw!)... Because pics are worth a 1000 words.

Nice job!

I see three issues though (was 4 until I seen that you realized that compressor gets hot as fuuuk).

1) that compressor is water resistant, not water proof.. Just dont have your hopes up.

2) the way you have the hose ran to the tank.. It should be at a downward angle. That is because moisture will build up in the line/tank and guess what direction it will flow... Yep, into the compressor. No bueno.
(Edit- took another look at the pic, you should be fine with how you have the compressor mounted upwards and the connection is higher than the tank.. But just leaving that one up so someone doesn't make that mistake)

3) I give it 2 weeks before you kick that switch/guage off the panel lol.

Who knows, you may be perfectly fine though. Good work, looks nice.
 
Last edited:
OP
OP
jgruberman

jgruberman

Senior Member
Joined
Oct 17, 2015
Posts
636
Reaction score
147
Ram Year
2015
Engine
EcoDiesel 3.0L
I've been debating the gauge in a pod on the pillar... has plenty of room though and you guessed it... self tapping screws into the plastic so it's pretty firm in there.

As far as the compressor... didn't have many choices but as long as I have the air filter in a dry area... it should be okay. it's far enough back where it shouldn't get too much kick up from water on the road and I don't ever really go into deep water anyway.

Sent from my SAMSUNG-SM-G935A using Tapatalk
 

AustinB

Banned
Joined
Sep 8, 2015
Posts
3,942
Reaction score
2,052
Location
San Diego, Left Coast
Ram Year
2015
Engine
hemi 5.7
Edited.

I had mine wired to the spod.. And just plugged one of the extra holes in the tank with a screw in guage (only had it for filling tires.. Have since converted to CO2 tank instead)

But guage pods would be cool imo.
 
Last edited:

AustinB

Banned
Joined
Sep 8, 2015
Posts
3,942
Reaction score
2,052
Location
San Diego, Left Coast
Ram Year
2015
Engine
hemi 5.7
Another cool place, that would be a ***** to install the hose fitting, is behind the gas lid

Excited to see a video of the output.
 
OP
OP
jgruberman

jgruberman

Senior Member
Joined
Oct 17, 2015
Posts
636
Reaction score
147
Ram Year
2015
Engine
EcoDiesel 3.0L
Another cool place, that would be a ***** to install the hose fitting, is behind the gas lid

Excited to see a video of the output.
I don't want to be "that guy" who randomly honks at people, so I'll get some video tomorrow when I can get down a country road where I won't **** anyone off lol

Sent from my SAMSUNG-SM-G935A using Tapatalk
 
Top