ALL Warning Lights coming on

[TimsRocco]

This has been happening for a while on and off but on a 5 mile drive it just happened 4 times.
Without any warning or other symptoms ALL of the warning lights come on briefly for a few seconds. They go off leaving the amber 'power steering' light (steering wheel). That goes out after about 39 seconds.
Nothing else happens. No noise, loss of power products problem with steering.
Just wondering if anyone else has experienced similar and how it turned out.
Thanks in advance.

[chelspeed]

The only time I'm aware that all the lights come on is when you first turn the ignition on. So I'd be looking for an intermittent (very) fault on the 12V from the battery. Must be a very quick fault if it doesn't show any other symptoms.

I'd disconnect all the main 12V feeds, clean up the metal terminals, smear with vaseline and refit tightly. Then follow them as far into the loom, fusebox as you can and do the same. I guess it's just as likely an earth fault so do the same on the negative side

Second try - leave the ignition on and wiggle all the 12V feeds and earths while someone watches the dash lights to see if it's a cable broken internally.

I think the power steering light stays on after the battery is disconnected until it's done an internal test which may explain why that one stays on. Although I thought I'd read that the self test was lock to lock on the rack rather than a fixed time.

No real confidence that this is the answer and never seen similar but that's what I'd do if it was me.

If you have access to a VCDS I'd also be checking fault codes to see if there's anything of use recorded.

[xjay1337]

Scan car with VCDS it's very handy in helping with electrical issues.............

[Cuprabob]

Sounds like a bad earth in the cluster / dash

[TimsRocco]

Thanks all.