Diacom cable for GM

[swagaero]

sfg wrote:
> 
> I purchased the Diacom diagnostic interface (GM) kit back in '92. It
> runs under DOS and has been worth the $200 or so I spent on it.
> The supplied cable, which connects your RS232 to the ECU (ALDL) has a
> red wire for 12VDC input. Recently I discovered the system works with,
> or without the 12VDC connected. I had always assumed there were active
> components molded into one of the connectors; now I am wondering if its
> really just a hunk of wire, with connectors on each end. Anyone know?
> Steve


diodes, diodes, diodes, diodes and more of them used as gates and most
ECM's don't neeed the voltage

Steve Parkman
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