-- Last Updated: Jan-30-13 9:50 PM EST --
..... what steps are you required to take in order to apply for new title and registration in your name .
In our state one has to have the trailer they just purchased from an individual , inspected (same as an auto) , then if the inspection passes , fill out the forms for new title and registration , and present the passed inspection certificate along with the filled out forms and $$ fees at the time of applying .
You may not have to insure the trailer because it will be towed by an insured auto ... but that is something you must ask your MVA and insurance company about to have a conclusive answer to .
These things are what comes to mind ... a state inspection of trailer (and the "it passed" certificate) , MVA new title and registration/tag forms , insurance coverage , asscociated $$ fees .
ps. ... get those stop and running lights fixed asap , maybe no more than a bulb or short , or fouled ground wire , in any case take you no more than an hour to rewire the intire trailer with new lights ... also sounds like the existing tags you mentioned are the previous owners (now void) , not yours ... and probably should have been turned in to avoid fines . In this state when you sell an auto (or trailer) you usually cancle it's insurance and turn in the tag , because an uninsured tag/registration brings big fines ... could be similar in S.Ca. ??