dead tacho - no signal?

[nowynowy]

Hi, last thing that has to be sorted out is dead tacho. Everything else works just fine, i checked it on 2 different instrument clusters and no rpms. Therefore, i suppose that no signal is being sent. But that's everything what i was able to deduct. Any ideas where to start?

[jamesy12345]

according to the info in the wiring diagrams below, the tacho gets it's signal from the ECU

http://www.volvo-480-europe.org/volvo480/downloads.php

maybe worth checking although not had this problem myself