l. Upon request, show them your driver's license, registration, and proof of insurance. In certain cases, your car can be searched without a warrant. To protect yourself later, you should make it clear that you do not consent to a search. It is not lawful for police to arrest you simply for refusing to consent to a search.
2. If you are given a ticket, you shoudl sign it; otherwise you can be arrested. You can always fight the case in court later.
3. If you are suspected of drunk driving (DWI) and refuse to take a blood, urine, or breath test, your driver's license may be suspended.
Stay tuned for the next part will be about if you are arrested or taken to the police station.

If you refuse a DUI test in Ca. your license will be revolkes no restricted license or nothing for 1 year fist offence 2 years second. Have a Great day

CA...thank you for your reply. My information comes from the ACLU in Washington State. Check your own local state rules after you read these ruls. FYI

Lotta new laws here in Ca. the Dui one I gave you was old and first hand experiance.