EUDM gauge cluster

[banpei]

I don't expect it to be very different from the JDM version. As I could find a teardown of the USDM and AUDM gauge clusters, but not for the EUDM. So the teardown is meant for documentation purposes.

According to the documentation I found on AUDM and JDM speedometers and Project D's reply it should give a pulse output. For JDM ECUs it won't allow you to rev beyond 7000rpm unless there is a signal in the ECU coming from the speedometer. Probably they did this to protect the unloaded engine. According to the wiring diagram in the AE86 workbook the LHD gauge cluster should also output a signal to the ECU, so that's why I'm hopeful I can tap into the pulse signals and count them with an arduino and then send out a signal on another channel.
(probably it still involves a relay to send power to the chime)