Another bad DEF Harness

[EA37TS]

Picked our rig up from the RV dealer and went straight to the Freightliner dealer to have the check the MIL and ABS lights.

The ABS is a bad rear wheel speed sensor.

The MIL is a bad DEF heater harness. This same dealer repair this harness 2 years ago.

Looks like a week before they can schedule it into the shop.

Apparently there is also a recall that has to be applied. I didn’t get a recall notice.

[EA37TS]

Bad diode in the DEF Heater harness/system.

Picking the coach up in the morning. Tools 2 weeks to repair due to staffing shortages.

[Mnwelsh]

A year ago I had a DEF header failure do to a DEF wiring harness that was pinched and crushed due to poor installation. We were traveling back from Texas to Minnesota and were forced to spend 3 days at a Freightliner Dealer to get everything repaired. —— I just returned from Texas again, the RV has run about 7000 miles since the repair with no further problems. Keeping my fingers crossed. I have driven it for a year with nothing breaking or needing repair. I’m in a sweet spot. Hope it continues. We spend about 5 months per year in our Senica.

[EA37TS]

FWIW the diagram the tech used for a troubleshooting reference was A66-05933-000.

The problem was in Circuit 532M2+