Hellwig Air 6290 - Manual (Page 18)

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24. Connect elbow fitting on relay bulkhead to 1/4” fitting on tank using 1/4” nylon tubing as
shown. Make sure hose will not be damaged by rubbing on any frame mounted components.
25. Route 12 ga and 16 ga electrical wires from compressor to engine compartment along
driver’s side frame rail. Make sure to fasten wires securely to existing wire harness.
Follow
plumbing and wiring diagram for connection of leveling valve, compressor, and relay. Take care
when routing air and electrical lines that they will not be crimped or chafed during installation or
use. Deviation from the electrical diagram and failure to use an inline fuse holder (supplied) will
void warranty. DO NOT install fuse in inline fuse holder until all connections and circuits are veri-
fied to be completed correctly.
6090 ( R-6090) 03/09/07
Tank connection to relay
Relay connection from tank
Use existing hole in crossmember to
ground compressor and relay. Remove
coating to provide ground contact.
Relay connections—see
next page for schematic.