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Electrical fault, warning lights (intermittent)

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My Octavia (80,000 miles, 54 reg) has developed a strange fault which the dealer can't repair. First sympton is red flashing brake light with associated warning buzzer (always 3 buzzes) which seems to happen at random - ie not associated with brake use. Very intermitent fault. Sometimes it stops at this, other times lots of other warning lights flash in sympathy, repeatedly over several minutes. Sometimes there is loss of power to rev counter, fuel gauge and panel lights. Sometimes airbag light then remain on (to be removed by dealer). On worst occasions red STOP warning appears in display. Computer remaining mileage gores to zero, but all other functions intact.

During all this light display, car handles as usual, but the light display is disconcerting and the buzzing annoying.

Presumably there is some kind of bad electrical connection? It's been to dealer several times - thought they had fixed it but it's happening again now.

All help appreciated!

Sounds a bit obvious, but check that your negative lead is tight on your battery. The battery has tapered posts and over a period of time they shimmy up the post and intermittently lose contact with the post. Does your clock reset and lose your one touch windows ??

We get a large number of callouts to Octavia, Golf V and A3 with this issue, all with the same outcome.

Hope it works:thumbup:

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Obvious is good! Battery connections seem fine. Clock doesn't reset, and as far as I'm aware, one touch windows still work fine....

Doh ! Worth a go though.

If they plug in the VAS, Check to see what faults are coming up on 03 ABS and 17 Dash panel. You may well find that there could be a fault along the lines of CAN communication sporadic. If this is the case, check all othe rcontrol units to see if there is a CAN break present. If you have multiple faults in control units saying DASH Communication sporadic, change dash panel. If multiple faults reading ABS Communication sporadic, I would look at changing the ABS control unit.

HTH

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