Jeep Wrangler 2017–2020 — technical service bulletin
Bulletin 08-052-20 · NHTSA communication 10176564 · issued May 1, 2020
Technical service bulletin
communication type
Visibility
component
2017–2020
model years
4
vehicle entries
Official summary
Rear Window Defroster Inoperable This bulletin involves inspecting and possibly repairing the terminal of the rear defroster circuit. Customers may comment on one or more of the following:Rear window defroster is inoperable. Wire(s) hanging from the defroster back glass.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.