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Old 09-18-2021, 02:24 PM   #34
Solder Sloth
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Join Date: Nov 2012
City & State: CO
My Country: USA
Line Voltage: 120VAC 60Hz
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Posts: 6,523
Default Re: Catapillar ECU repair, need N548AB replacement?

Well I gave you one possible explanation which is not completely far fetched albeit evil explanation of what's going on. Yes I hate buried vias/buried pads and I think they're also frowned upon for best practices, but can't discount this possibility when you don't know where the s/d pins go?
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