Car Repair

Mildly_Miffed

https://forums.moneysavingexpert.com/discussion/comment/81990220#Comment_81990220

DEFINITELY not going to be that simple.

The "switch" is simply sending a coded message over the car's CanBUS network to the body control computer to turn on or off flashing all four indicators.

born_again

E-Bay for a replacement unit?

MattMattMattUK

https://forums.moneysavingexpert.com/discussion/comment/81990469#Comment_81990469

I was thinking the same, lots of breaker's yards sell on there.

Goudy

If you fitted a generic hazard switch and another flasher unit you'd bypass the canbus part altogether.

The indicators and flasher relays still run 12v, it's only the turning on and off that's canbus controlled (and it's that that's buggered). Plenty of vehicles ran hazards before canbus, just revert to that.

You can even buy kits for this. Most are designed for motorcycles (that also might run canbus for indicator and other controls) but you could adapt it for a car, it'll just need some longer wiring.

Custom Dynamics 4- Way Hazard Kit For Metric Motorcycles (4WAYHAZARDKIT) | ARH Custom UK

Instructions are simple.

4WAYHAZARDKIT_2.pdf

WellKnownSid

https://forums.moneysavingexpert.com/discussion/comment/81990347#Comment_81990347

Perhaps what is needed is one of these can bus button things off eBay - programmable as to what you want the button to do. I guess a working donor car would be needed to code it up?

Goudy

Vauxhall Opel Astra 2016 to 2019 Circuit Board Navi 900 – Quickcycle

Or is it this bit?

Vauxhall Opel Astra 2016 to 2019 Buttons Navi 900 – Quickcycle

They also do a repair service, so you might be able to send your own it for a repair.

Fixed price repair services – Quickcycle

If these aren't the right bits, they still might be the people to talk too.

From what I can gather, the main unit's board has the two plugs in the back in the same position as yours and the lower control panel with the hazard button is connected via the ribbon (orange to orange) to the main unit.

So you must be able to split the main unit from the button panel, which means you can replace the button panel without changing the main unit and have all that coding headache. You just need a working lower button panel and swap it over.

ladruid

Always said more technology in cars was a bad thing… can you go back to basics, get a car electrician to fit a manual switch to the indicator relays?

I know my jap import has an aftermarket manual a switch installed for fog lights, another MOT requirement.