boatlessbob
Recruit
- Joined
- Oct 24, 2012
- Messages
- 5
2003 F90TLRB - Yellow wire to TCI/CDI & Tach Signal???
What is the purpose of the yellow wire that is connected to ground and the 8 pin (middle) connector on the TCI/CDI ??? I'm curious since it's the only ground wire that's connected through a bullet connector and could be disconnected by itself.
It's also my understanding that this motor uses a TCI instead of a CDI to control the ignition timing, and the tach signal is generated by the TCI.
From searching the internet, it appears the pulser coils provide the crankshaft position and RPM which are used by the trigger circuits for the ignition coils.
Does anyone know if the tach signal is derived specifically from Pulser Coil #1 or Pulser Coil #2, or if the TCI actually samples the input form both coils to generate the tach signal?
What is the purpose of the yellow wire that is connected to ground and the 8 pin (middle) connector on the TCI/CDI ??? I'm curious since it's the only ground wire that's connected through a bullet connector and could be disconnected by itself.
It's also my understanding that this motor uses a TCI instead of a CDI to control the ignition timing, and the tach signal is generated by the TCI.
From searching the internet, it appears the pulser coils provide the crankshaft position and RPM which are used by the trigger circuits for the ignition coils.
Does anyone know if the tach signal is derived specifically from Pulser Coil #1 or Pulser Coil #2, or if the TCI actually samples the input form both coils to generate the tach signal?