Hi. I am trying to diagnose a problem with the headlights on my 999. The fuse and relay are fine, the wiring seems ok (with good continuity everywhere) but the light doesn’t switch on. If I earth the correct relay connection it switches / clicks and the headlight lights. It appears to be a problem around the dash, which should earth the appropriate pin other than when the starter is running.
Has anybody else seen this problem? I’m wondering whether a transistor has failed in the dash, but I’m also going to try to sniff the CAN bus to see whether the ECU is instructing the dash correctly. Any suggestions would be welcome. Thanks.