Electric 66 speedo

[dayj1]

Connector 1 of the E38 pin 57 is the speed output. In a factory harness, I believe it is yellow with a black stripe (in the truck application). It's the output for the ABS system and is 128K pulses per mile. If you're using a car OS and harness the pin is not used, but you can turn it on in the tune and add the wire to pin 57 and it will be 4K pulses per mile. Unless this has changed in the last year or so, the pulses per mile is not configurable for the e38 in HP Tuners even though it appears that it is (i.e. changing the output pulses has no effect on the actual signal)