I have the Sm and DM-5 combo almost done with my obd1 swap ill post up everything for you hopefully by the end of this weekend after i make sure all my wiring is correct.
ok i looked at my notes again the gnd is to be pined under the 3.3v if you want to read in lambda instead of A/F values. i like my A/F numbers so you leave it unhooked. the box is grounded already with the power and ground connector also the RX TX connectors ground the device.
they gave me 1 wire with a connector on it i used for the Narrow band (NB) i cliped it into the harness for the plx then took a connector off a dead 02 and soldered it to the white wire. i de pinned the green wire and ran a 1k resistor between the 2 black wires. now i crimped a connector provided from plx to a wire and pinned it wo the wide band (WB) spot on the plx connector and then soldered it to D10 of my harness.
