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Guess those pics reveal more than I knew-- can you see my reflection in the gel? Thanks, but the only lasers I have won't trim resistors;-)
To answer your question about the 18-pin dip I had to dig out the notes I made about two years back. That is the Bosch labeled part "30047" at BS-203. But in my notes, I traced the pin 21 ign switch signal supplying a ground to the "main" relay portion of the fuel injection duo, not to the 30047 I concluded was a transistor array, but to a discrete T-305. The effect of the circuitry here is to keep power to the AMM for the burnoff function time after ignition key is shut off.
But the 18-pin array, if that's what it is, drives a bunch of external things like the rpm or load signal, actual AMM burnoff signal, check engine lamp, shift indicator/OD lamp (which still confuses me as the pin is obviously an output even though the OD lamp is sourced at the OD relay) and as an input, looks at the VSS signal provided by the speedo board.
I was tracking the reason for a very hot R315 on a -933 EGR version I found in our non-EGR 89 245. Then I gave some thought to the BS-203 with the Bosch p/n being a private labeled standard (probably just wishful thinking) transistor array, but lost interest when I found the warm resistor had nothing to do with the particular failure in the -933.
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Art Benstein near Baltimore Crrrrazy Ray's!
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