Operation CHARM: Car repair manuals for everyone.

Seat Temperature Relay: Testing and Inspection




Power Relay Test

Use this chart to identify the type of relay, then do the test listed for it.

NOTE: For the turn signal/hazard relay 1 input test, refer to Lighting and Horns.

Normally-open type




Check for continuity between the terminals.
- There should be continuity between the No. 1 and No. 2 terminals when power is connected to the No. 4 terminal and ground the No. 3 terminal.
- There should be no continuity between the No. 1 and No. 2 terminals when power is disconnected.