Attention: TDR Forum Junkies 
Dear Friends,
I just complete the next addition to the Dodge After doing a month of research on the internet I decided I wanted to add a Nathan P3 train horn. I picked this horn because I liked it’s deep sound, but more importantly it uses less air that most horns which is important since I don’t have a train load of compressed air.
The hard part was finding the right horn. I had to derail three trains before I found a Horn that I liked … ( just kidding )
Here is the list of part I used
1. Nathan P3 train horn
2. 400C ViAir 12volt Compressor
3. 5 gallon air tank
4. 175 pound pop off
5. ½ air line
6. ½ Solenoid valve
7. Pressure switch with relay
8. Painless wiring fuse block
Mounting the P3 turned out to be the easy part. I had a piece of scrap Aluminum channel that I bolted down to my Kayak rack. The P3 horn weights about 15 pounds so it needs a pretty solid place to bolt it down to.
I mounted the switches in the roof console, I decided to us different switches so I could find the switch I wanted in the dark. This is a really easy place to mount switches compared to putting them in the dash. Getting thru the firewall is the hardest part of the whole deal.
Wiring was way more complicated than I expected . I used 4 in 1 - 10 gauge underground wire to go from the battery to the tool boxes . In order to get lots of power to the tool box I used three of the ten gauge wires to and one for the negative plus a ground wire to the frame, I figure this is a lot of overkill, but overkill is what a Cummins is all about.
Then I used relay for fuse block, compressor and solenoid valve. I hid most of the wiring in an inch space under the plate the compressor is mounted too.
While I was wiring I wanted to add a inverter and it helped cover up the relays and help makes things look a little neater
The end result is once I turn on the compressor it takes 3 minutes to pump up the 5 gallon tank to 150 PSI.
And that give me about a 20 second blast, which does not sound like much but trust me it is plenty at this volume.
I just complete the next addition to the Dodge After doing a month of research on the internet I decided I wanted to add a Nathan P3 train horn. I picked this horn because I liked it’s deep sound, but more importantly it uses less air that most horns which is important since I don’t have a train load of compressed air.
The hard part was finding the right horn. I had to derail three trains before I found a Horn that I liked … ( just kidding )
Here is the list of part I used
1. Nathan P3 train horn
2. 400C ViAir 12volt Compressor
3. 5 gallon air tank
4. 175 pound pop off
5. ½ air line
6. ½ Solenoid valve
7. Pressure switch with relay
8. Painless wiring fuse block
Mounting the P3 turned out to be the easy part. I had a piece of scrap Aluminum channel that I bolted down to my Kayak rack. The P3 horn weights about 15 pounds so it needs a pretty solid place to bolt it down to.
I mounted the switches in the roof console, I decided to us different switches so I could find the switch I wanted in the dark. This is a really easy place to mount switches compared to putting them in the dash. Getting thru the firewall is the hardest part of the whole deal.
Wiring was way more complicated than I expected . I used 4 in 1 - 10 gauge underground wire to go from the battery to the tool boxes . In order to get lots of power to the tool box I used three of the ten gauge wires to and one for the negative plus a ground wire to the frame, I figure this is a lot of overkill, but overkill is what a Cummins is all about.
Then I used relay for fuse block, compressor and solenoid valve. I hid most of the wiring in an inch space under the plate the compressor is mounted too.
While I was wiring I wanted to add a inverter and it helped cover up the relays and help makes things look a little neater
The end result is once I turn on the compressor it takes 3 minutes to pump up the 5 gallon tank to 150 PSI.
And that give me about a 20 second blast, which does not sound like much but trust me it is plenty at this volume.
