Leonard L. Whorton, who resigned as Fairfax County executive slightly more than six years ago under pressure from a majority of his bosses, is being pressured to resign from the administrative post he subsequently took in California.

Whorton moved to Sonoma County in Northern California's wine country in November 1978 after quitting his Fairfax County job upon learning that a majority of the Board of Supervisors was prepared to ask for his resignation. At the time, one supervisor said Whorton was not assertive and was poor at communicating with the board and his staff.

Whorton, now the top administrator of Sonoma County with two years remaining in his contract, has been asked to resign from the $70,000-a-year job by the county Board of Supervisors there. He was told that if his resignation was not forthcoming by this morning, the board would vote to give him 90 days' notice, as the contract provides.

Whorton would not comment publicly on the request for his resignation.

The change of Whorton's political fortunes in California comes after a tumultuous year in Sonoma County government, a period when the supervisors' expensive election campaigns competed for newspaper headlines with $40 million in court-ordered jail improvements and other costly items.

Four days before Christmas, a Sonoma County grand jury issued a stinging report that declared that the county government is caught in a web of "weak leadership, poor direction and a lack of coordination."