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      06-21-2022, 07:11 PM   #1
aerostorm
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Sudden lights on dash (gearbox, abs steering) dim lights

Hi all, I was driving on a motorway at night at about 70 on cruise control. Suddenly there was a clunk & loads of dash lights came on! Yellow gearbox light, abs, steering control. Engine sounded fine & drove ok. Then wipers came on on their own! Weird. Lights started to dim. Speedo dropped to zero & rev counter stuck at 3000 revs (though I could hear the engine was lower than that! Crawled home & car limped. Dash lights coming on & off, wipers still going, couldn't turn them off. Lights dimmed more, now on A roads engine showed yellow engine coolant overheat. Power steering not working, but still able to just about steer! Engine coolant now red! Car slowed but still drove! But obviously very heavy. Eventually stopped! Battery clearly almost drained!

Soooo, thoughts on reasons please? I'm assuming either alternator or battery? But I dunno! Any ideas would be very gratefully received!

Thanks so much everyone!
Daniel
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      06-22-2022, 03:17 AM   #2
jacbo
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Have you got a code reader? get that plugged in and see what you get
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      06-22-2022, 03:34 AM   #3
Silver Streek
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As above read the codes and see what comes up. Does sound like it was running out of charge, maybe the alternator went and your battery drained through the journey.
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      06-22-2022, 07:11 AM   #4
Andystobbs
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Why not open the bonnet
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      06-22-2022, 11:29 AM   #5
therealdb1
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Good chance it could be a drive belt gone maybe!

Without seeing the car anyone would be guessing!

You need to do some preliminary checks yourself but if you lost drive to the alternator and have killed the battery getting it home there will be all sorts of codes stored many of which will be no help whatsoever!

First step is make sure the alternator is running and giving an output and the battery is taken off the car and fully charged. You will be chasing your tail with a flat battery.
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      07-03-2022, 08:36 AM   #6
aerostorm
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Quote:
Originally Posted by Andystobbs View Post
Why not open the bonnet
Helpful, thanks! 🙄
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      07-03-2022, 08:40 AM   #7
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So, update. I've got the secret dash UB voltage readout showing only 11.6 volts while engine is running! Clearly the battery isn't getting charged enough! But car does drive, but obvs battery light comes on & off! So I guess I'm trying to get thoughts on whether it's almost certainly the alternator (expensive)? Or hopefully just the voltage regulator (much cheaper)! Any experts got any thoughts on likely hood!
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      07-03-2022, 05:05 PM   #8
therealdb1
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You need to measure the voltage output of the alternator not some arbitary voltage derived from somewhere in the electronics.
It could be a faulty battery pulling the voltage down at the point it is being measured.
Disconnect the battery from the car and put it on a decent charger and see what voltage you get once fully charged if indeed it will take a charge.
Simple multimeters are not expensive and are useful around the house as well as on the car.
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      07-04-2022, 04:42 AM   #9
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yes, i've got a draper multimeter off ebay for about 12. this way you can easily pin point what is at fault. there's plenty of tutorial online on how to do this and what to check.

good luck
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