Oil buzzer, no light, shaky tachometer, dies when hot - 1.9 TDI ALH

[$hitblast]

Yes, I've been reading about the missing GP-light. The GP-light supposedly indicates that the ECU is fully on. A failure of GP-light is usually caused by faulty relay 109, according to the DIY on TDIclub. 109 gives main power to ECU. I pulled the 109 and bench-checked it. It was nice and clean inside, with no visible corruption, and clicked fine, both at room-temperature, and when heated with a dryer.

[gldgti]

must be something other than the relay then. All the symptoms you describe would seem to indicate an intermittent electrical fault... thats why I suggested ignition switch.

[$hitblast]

I see, but if the igntion switch is reliably closing relay 109, what else could it be failing to do? I don't know much about ALH ignition switches.

[$hitblast]

I replaced the 109-relay. That seems to have corrected the problem. There is no GP-light-delay when twisting the key any more, and it starts and drives nicely. Been driving it for somewhat more than two hours on steep inclines, with no incident thus far.