Sprinter 2500 L5-2.7L DSL Turbo (2003)
Seat Heater Relay: Testing and Inspection
The heated seat relay is located in the Fuse Block, under the drivers seat. Refer to Wiring for the location of complete heated seat system wiring
diagrams.
1. Remove the heated seat relay from the fuse block.
2. A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK,
go to Step 3. If not OK, replace the faulty relay.
3. Resistance between terminals 85 and 86 (electromagnet) should be 75 ±5 Ohms. If OK, go to Step 4. If not OK, replace the faulty relay.
4. Connect a battery to terminals 85 and 86. There should now be continuity between terminals 30 and 87, and no continuity between terminals 87A
and 30. If OK, check the relay supply circuits. If not OK, replace the faulty relay.
