Car electrical system shutdown

[Bloomer26]

After around 40-1h of driving at night (lights/dash on) a few warnings start to appear; hill start assist unavailable, vdc unavailable, yellow lock symbol appears(immobiliser unavailable) then finally the dashboard and headlights intermittently turn on and off whilst driving. (Radio still works) Pulled over, turned the car off, would not turn back on again (clikingsound), key gets stuck in the holder .

After leaving it for around 10-20mins(ish) it seems to reset itself. Then after another 20-ish minutes, the cycle repeats itself (lasts 40-1h after leaving off overnight). I've had the alternator and battery replaced. There is no general voltage drop or spike when the above happens. Only seems to happen when the lights/dash are on as I have driven the car during the day with no issues for approx 2h30.

 

[brianmoooore]

You haven't said what car this is, but I' be looking at whatever body control module is in charge of the headlamps. Sounds like it is overheating, or has become sensitive to normal heating, and is affecting many other things on the car.

 

[Bloomer26]

You haven't said what car this is, but I' be looking at whatever body control module is in charge of the headlamps. Sounds like it is overheating, or has become sensitive to normal heating, and is affecting many other things on the car.

 

[Bloomer26]

You haven't said what car this is, but I' be looking at whatever body control module is in charge of the headlamps. Sounds like it is overheating, or has become sensitive to normal heating, and is affecting many other things on the car.

Hi. thanks for the reply, really appreciate it.

Yes, it’s the alpha 159 1.9jtdm

I think I have located the issue, the board inside the car. When the car heats up the issue starts but when I press down as in the video it turns on/off. Would replacing the fuse board help? I do have a spare I used for the relays. Appreciate the help! Cheers

 

[brianmoooore]

Hmmmph! Italian cars and electrics!

I'm not at all familiar with this car, or any other Alpha, but it looks like that might just be a fuse/relay board, rather than an electronic control module, and the fault might be something as simple as a poor connection, or, a cracked (dry) solder joint.
If you can make the fault come and go at will, concentrate on narrowing it down as far as you can, before removing the board and carefully checking it. A 'dry' joint has a crystalline appearance, and often a faint grey ring around it.