Operation CHARM: Car repair manuals for everyone.
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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Hall Effect Sensor: Testing and Inspection

Testing Hall Effect Switch:






1. Carefully noting polarity, connect battery and suitable voltmeter as shown in Figure.
2. Voltmeter should read less than 0.5 volts. If not, replace Hall Effect switch.
3. Insert knife blade as shown in Figure. Voltmeter should read within 0.5 volts of battery voltage. If not, replace Hall Effect switch.