To troubleshoot power steering problems, you should:
* Check fuses: Start by checking the fuses related to the power steering system in the fuse box (usually under the hood and/or in the dashboard). Your owner's manual will show the fuse layout and which fuses are relevant.
* Consult a repair manual: A repair manual specific to your 2008 Dodge Avenger will provide the most accurate information on diagnostics and potential failure points.
* Diagnose with a scan tool: A professional-grade scan tool can read codes from the PCM, which might indicate the problem area. This is the most effective way to pinpoint the cause if the problem isn't a simple fuse.
Trying to find a specific "power steering relay" will likely be fruitless. Focus on the electrical system's overall power supply and the PCM's control of the power steering pump instead.