11 No ignition reference signal detected during cranking (bad Hall effect) OR timing belt skipped one or more teeth; OR loss of either camshaft or crankshaft position sensor. Can cause the engine to stop working entirely with no limp-home mode.
12 Battery or computer recently disconnected
13*...
Here is one cheaper with free shipping in the states. The other one may have a terrif
https://bluestarperformance.com/product/heater-blower-motor-resistor-3847094-f-m-body-1979-80-nos/