Diagnosis And Testing - Horn Relay
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WARNING:
On vehicles equipped with the high voltage system, disconnecting the 12-volt battery negative cable alone will not power down the 12-volt system. You must perform the 12-volt Power Down procedure before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
The hard wired inputs and outputs of the horn relay in the Power Distribution Center (PDC) may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information.