Question about Mercedes-Benz Sprinter
Have relay and fuse and horn still not working
Posted by Anonymous on
I have the same fault in my 313CDI.
By pushing the alarm button the horn works.
Sometimes the horn worked intermittently so I suspect the wiring/ contacts on the steering wheel?
Posted on Oct 08, 2015
With test light check voltage at horn assembly on both wire's, could only have one, horn assembly itself could be ground, have some one press horn button while checking, if there is voltage replace horn assembly, if no voltage horn pad at streeing wheel bad. that's being fuse and replay are good.
Posted on Jan 04, 2010
Change the brushes in the heater motor.
Common fault on Merc Vitos and sprinters.
Brushes are on ebay. Search for "heater brushes"
Posted on Feb 05, 2010
Tips for a great answer:
If the test lamp illuminates, refer to the Horn Test.
Ignition OFF, disconnect the inline harness connector C275. Ignition ON, test for B+ between the horn relay control circuit terminal B and ground.
If less than B+, test the control circuit for an open/high resistance. If the circuit tests normal, replace the underhood fuse block.
Momentarily connect a 3-A fused jumper wire between the control circuit terminal B and ground. The horns should work.
If the horns do not work, replace the underhood fuse block.
If all circuits test normal, test or replace the horn switch
The PCB relay horn system consists of the following components:
Horn PCB relay
Body control module (BCM)
HORN fuse 15 A
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