Later, he was twice elected to the Legislative Assembly of the Province of Canada, sitting as a member of the French-Canadian Group.

His older brother Joseph Franchère was a member of the Legislative Assembly of Lower Canada in the early 1820s.

Their sister Marguerite married Rémi-Séraphin Bourdages who represented the Rouville area in the Lower Canada Assembly from 1830 to 1832.

He was also involved in the lumber trade and saw mills, and owned a barge for transporting goods on the Richelieu River.

[1][3] When the Lower Canada Rebellion broke out in November 1837, an arrest warrant issued against him, with a reward of £500.

Franchère fled to the United States with two other merchants from Saint-Mathias, Louis Marchand and Eustache Soupras.

He was a director of La Banque du Peuple, which was suspected of having financed arms for the Rebellion.

The inventory of his property included two pianos and three portraits, of Pope Pius IX, Jacques Cartier, and Bishop Joseph-Octave Plessis.

His widow reported that he had claimed £1,300 in compensation from the government for losses suffered during the Rebellion, and had received £837.