Operation CHARM
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2002
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Impreza WRX Wagon F4-2.0L DOHC Turbo
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Repair and Diagnosis
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Relays and Modules
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Relays and Modules - Lighting and Horns
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Horn Relay
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Testing and Inspection
Horn Relay: Testing and Inspection
Measure the
horn relay
resistance between terminals (indicated in table below) when connecting terminal No.4 to battery positive terminal and terminal No.3 to battery ground terminal.