Radio interference from rear defroster

Tags: #radio · #antenna

Symptom: radio static/interference appears specifically when the rear window defroster is switched on ¹. Root cause: the rear window defrost grid has the radio antenna integrated into it, so activating the defroster's heating circuit couples electrical noise into the antenna signal path ². Diagnostic direction: check the rear door/hatch's contact and wiring connection to the body — a poor or corroded connection at that interface is suspected to cause the crosstalk/interference; verify both the antenna's ground and its power connections as part of that check ².

Related pages

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• Radio button faults — Tesla-style touchscreen swap
• Rear defroster contacts after door replacement
• BSM module — CAN bus role and corrosion
• Aftermarket head unit — install and CAN-bus

Sources

This page is compiled from 2 community messages. Every fact carries a numbered reference to its original author and message.

Last updated: 2026-07-24