Diagnosis And Testing - Glow Plug Relays
WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Refer to the appropriate ELECTRICAL DIAGNOSTICS article for information on diagnosing the glow plug relays.