Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Heated Glass Element Relay: Testing and Inspection

1. Stop the engine. Connect the negative lead of a 0 - 15 volt range voltmeter to a known good vehicle electrical ground.

Rear Window Defogger Relay Test:

2. Reconnect rear window grid connections if disconnected for the Fuse and Electrical Short Test. Start the engine check the voltages present at the rear window defogger relay and rear window defogger grid. Refer to the Rear Window Defogger Relay Test table for diagnosis.