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MRC Diesel AC Sounder

I have one of these and all the features seem to work ok.

However, the sound is not very loud. 

The instructions say push button 6 first and wait 2 seconds, before pushing another button.

What other button do I push to make the horn louder?

Original Post

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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