You did not mention whether you have a manual or auto trans.
There are two relays. One start relay and and one anti theft relay (if equipped).
If yours is auto equipped the switch is mounted where the shift cable is attached to the transmission.
I do however suspect you have the manual transmission as there is a service bulletin for a no crank problem. Here is the bulletin.
Date: FEBRUARY, 2007
TUCSON, TIBURON, ELANTRA, ACCENT
CLUTCH PEDAL IGNITION LOCK SWITCH REPLACEMENT (SERVICE CAMPAIGN T38)
DEALERS MUST PERFORM THIS CAMPAIGN ON ALL AFFECTED
VEHICLES PRIOR TO CUSTOMER RETAIL DELIVERY AND WHENEVER AN AFFECTED
VEHICLE IS IN THE SHOP FOR ANY MAINTENANCE OR REPAIR.
WHEN A VEHICLE ARRIVES AT THE SERVICE DEPARTMENT,
ACCESS HYUNDAI MOTOR AMERICA'S "WARRANTY VEHICLE INFORMATION" SCREEN VIA
DCS ON-LINE TO IDENTIFY OPEN CAMPAIGNS.
This bulletin provides the procedure for clutch pedal ignition lock switch replacement.
(EQUIPPED WITH MANUAL TRANSMISSION ONLY)
Also here is a basic wiring diagram.
Let me know here in comments if you need further assistance.
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