Check The Heated Seat Relay

Battery voltage	Terminal number	Normal value
No current supply	3 - 4	No continuity
With current supply [terminal 1 (+) - terminal 2 (-)]	3 - 4	Continuity exists (2 Ω or less).

Fig 1: Identifying Heated Seat Relay With Connector Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.