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Old 12-31-2015, 05:22 PM   #9
2014 GWV Legend 3500 I4
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Default Re: Espar D4 High Altitude Pump

Originally Posted by vanski View Post
Thanks Avanti.. Wondering if an old-school AB would vary in frequency and strength (period and amplitude) like the signal from the ECU does. Or perhaps only the period changes. Need to figure that out or just build it in regardless which was what I was planning on doing but I would need to have a varying sine wave to see if everything is working properly.
I am pretty sure that the pump is a binary device, i.e., the only thing that matters is the off-to-on transition. I don't think that the amplitude of the signal is modulated. Only the frequency matters. Could be wrong, though.
Formerly: 2005 Airstream Interstate (2500 T1N)
Now: 2014 Great West Vans Legend SE (3500 NCV3 I4)
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