Air Lift 27703 Second Compressor Harness For 3H/3P System Wiring. Allows addition of a 2nd air compressor to all AirLift 3H or 3P systems. See Pictures For Instructions. 2nd Compressor Wiring Harness. Fuse Holder w/30 Amp Fuse. 3 – Butt Splice Connectors. 2 – Eyelet Ring Terminals. Self-tapping Screw To Attach Relay. TO USA 50 STATES.