8 Bench Assembly..................................................................................................................................20
8.1 Assemble Air Fittings to Air Tank ................................................................................................20
8.2 Assemble Air Filter to Air Compressor........................................................................................21
8.3 Attach Threaded Rod to USTL Structure.....................................................................................21
8.4 Assemble Kit Components to USTL Structure.............................................................................22
8.4.1 Assemble Air Horns to USTL Structure................................................................................22
8.4.2 Assemble Compressor to USTL Structure ...........................................................................22
8.4.3 Assemble Tank to USTL Structure.......................................................................................23
8.4.4 Adhere Rubber to USTL Structure.......................................................................................23
8.4.5 Install Snap-In Caps.............................................................................................................24
8.4.6 Attach Leader Hose to Tank & Route Air to Horns .............................................................24
9 On-Vehicle Mechanical Assembly.......................................................................................................26
9.1 Remove Spare Tire......................................................................................................................26
10 On-Vehicle Electrical Installation....................................................................................................27
10.1 Relay & Fuse Diagram for Air Horn System ................................................................................27
10.2 Disconnect Vehicle Battery(s).....................................................................................................28
10.3 Connect Wires to Fuse & Relay...................................................................................................28
10.4 Install Horn Button......................................................................................................................29
10.5 Connect Pressure Switch.............................................................................................................29
10.6 Connect Air Compressor .............................................................................................................29
10.7 Connect Air Horn Solenoid(s)......................................................................................................29
10.8 Raise USTL Assembly into Final Position.....................................................................................30
10.9 Secure Wiring to Vehicle.............................................................................................................30
11 Final Steps & Testing.......................................................................................................................31
11.1 Reconnect Vehicle Battery(s)......................................................................................................31
11.2 Test Air Compressor....................................................................................................................31
11.3 Test Train Horns..........................................................................................................................31
11.4 Test Quick Connect Coupler........................................................................................................31
12 General Operation ..........................................................................................................................32
12.1 Compressor Operation................................................................................................................32
12.2 Horn Operation...........................................................................................................................32
