I'm a relative newbie. In a very helpful SPLUNK video on youtube, I saw as the nice lady showed how easy it is to search various HTTP fields (such as "status", "method", etc). With one catch though: I must set the sourcetype=access_combined. So my problem is I DO NOT SEE ANY events in my SPLUNK logs with this sourcetype, even though I do have some HTTP logs.
If you can see the HTTP log results in Splunk at all, look at the "source_type" field and see if Splunk matched it against one of the predefined types listed in the document linked to above. If "source_type" is not a field included as a part of each event in the search results, then use the list of fields on the left to "Select and show in results" to add that field to the results. You can also see all of the values that the "source_type" contains from the field list on the left as well.