I found some information about the SS Klipfontein three manifests from 1941.
Mar-22, 1941 arriving in the Port of San Francisco, California
Jul-15, 1941 arriving in the Port of Honolulu, Hawaii
Jul-22, 1941 arriving in the Port of San Francisco, California
After that no information however if they were in route and they received information about the attack they were probably ordered to the nearest port west of Pearl Harbor which I think would be the Philippines and radio silence would be a must to prevent an attack on their ship. The ship was taken control of by the War Shipping Administration 23 Feb 1942. A link to that info and a picture of the ship is also found there.
Dear Mr. Arechiga,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located a series titled Passenger Lists of Vessels Arriving at San Francisco, California, 5/1/1893 - 5/31/1953 (M1410) and Passenger Lists of Vessels Arriving at Honolulu, Hawaii, 2/13/1900 - 12/30/1953 (A3422) in the Records of the Immigration and Naturalization Service (Record Group 85) that may include passenger lists for the SS Klipfontein. For access to M1410 and A3422, please contact the National Archives at Washington, DC (RDT1) via email at firstname.lastname@example.org.
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M3422 is available and searchable on Ancestry.com. There may be a fee for using Ancestry. Instead, check for access at your local library as many library systems subscribe to these sites, making them free for their patrons. In addition, the document Genealogy: Passenger Arrival List Research Tips may be helpful.
We hope this information is helpful. Best of luck with your family research!