Sprinter 3500 L5-2.7L DSL Turbo (2004)
Seat Heater: Testing and Inspection
Heated Seat Element
For complete circuit diagrams, refer to Diagrams / Electrical.
NOTE: When checking heated seat elements for continuity, be certain to move the heating element being checked. Moving the element, such as sitting
in the seat will eliminate the possibility of an intermittent open in the element which would only be evident if the element was in a certain position.
Failure to check the element in various positions could result in an incomplete test.
1. Disconnect and isolate the battery negative cable. Disconnect the heated seat element wire harness connector from under the seat cushion. Check
for continuity between the seat heater driver circuit and ground. There should be continuity, less than 7 ohms. If OK, go to Step 2. If not OK,
replace the seat assembly.
2. Check for continuity between the seat heater B+ driver circuit cavity and the seat back frame. There should be no continuity. If OK, heating
element is OK at this time. If not OK, replace the seat assembly.
