Ok I have 1986 325E with a 95 m3 s50 obd1 swap. How do I wire up check engine light. On the c101 plug, pin 12 is empty. On the x20 there’s pin 8 [grey wire]. Do I pull the cluster and tap into green/white wire with pin 8 from x20?
Also how do I wire up diagnostic port. Is it pin 16 [white/black] from c101 to x20 pin 17 x20?. With both things wired up, will it allow me to scan for codes through diagnostic port from e36?
Also how do I wire up diagnostic port. Is it pin 16 [white/black] from c101 to x20 pin 17 x20?. With both things wired up, will it allow me to scan for codes through diagnostic port from e36?