Modern cars switch grounds to activate relays. Ground for the auto shutdown relay comes from the PCM, Seems to me that the O2 sensor heater circuit is tied in to this, but I can't remember exactly how. I have some 1980s FSMs. I'll look to see if I have the 1988 set (if I can get to them).
That's what I've read online, the PCM sends the ground to activate the relay.
Both the dark blue with white stripe wire and the dark blue with yellow stripe wire come from the PCM.
At least that's what the wiring schematic that I found online shows.
For now I've wired an only hot when the key is on wire lead into the blue /white stripe wire of the relay so I can move the car around.
I rechecked the DTC codes and now it only shows an #11 and a #12 code.Kinda weird on the #11 code since it actually runs.
11 No ignition reference signal detected during cranking (bad Hall effect) OR loss of camshaft sensor (and, for cars with crankshaft sensors - which does not include the 2.2/2.5 - timing belt skipped a tooth or loss of crankshaft sensor). See note #8 below.
12 Battery or computer recently disconnected
