DFI warninmg horn voltage

[captdale]

Won't be able to measure it before tuesday but was wondering what the signal was that activates the horn. +12 Vdc or a ground ??

 

[captdale]

To answer my own question..... When the key is turned on it supplies 12 Vdc to one side of the horn. On startup or when a fault is detected, the ECU supplies a ground to the other side of the horn, turning it on.

 

[galamb]

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