06' HR Ambassador ISC 330 Boost Alarm
When climbing slight grades at normal interstate driving speed, I generate this alarm, which starts off like a cricket sound, then progresses to a full alarm. I first thought it was Power Gear float switch. New float switch installed no joy. It appears to be related to the turbo boost. If managed to under 20psi boost no alarm. In the 23 psi range it will deliver a full alarm. Nothing in the manuals relate to this type of alarm. There are no visual alarm, only audio. Am I missing something. Any suggestions, before taking it over to Cummins.
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