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Model specific boards => Golf mk4 => Topic started by: mcgee9t2 on 17 October 2012, 21:21

Title: abs light coming on
Post by: mcgee9t2 on 17 October 2012, 21:21

Last friday cominng home from work my abs light came on shortly after setting off. turned engine off but couldnt start again cause battery was flat. got jump started. everything fine.

Again today the light came on droped a gear so the revs increased and the light went off. again fine rest of way home.


am i right in thinking that this could be a alt/battery fault meaning low battery not able to power abs?


Havent had chance to test alt/battery. gonna get a drop test on the battery this weekend anyway.

but any help apreciated. ideas?

Title: Re: abs light coming on
Post by: Hoggy on 17 October 2012, 22:06

I've known jiggered batteries to cause all sorts of mad problems including radge engine management codes.

Best bet is to test the battery, scan for codes, then work from there.

Title: Re: abs light coming on
Post by: Bazmcc on 17 October 2012, 23:49

I would advise against a drop test.  It's quite primative and may well kill your battery if it isn't already gone.

This may concern you slightly but check the fuses on top of the battery very carefully.  One there can cause the abs light to come on and is connected to a problem with the wiring.  One is known to crack instead of blow through and can melt the alternator loom and the fuse holder.  It can also start an engine bay fire in severe cases.  Best to get it checked asap.

Title: Re: abs light coming on
Post by: mcgee9t2 on 18 October 2012, 08:34

Is there any other way to test a battery?

will have a look at fuses tonight.

cheers.

any other suggestions keep them coming cause with winter coming i dont want an abs fault  :grin:

Title: Re: abs light coming on
Post by: mattkh on 18 October 2012, 10:02

Quote from: mcgee9t2 on 18 October 2012, 08:34

any other suggestions keep them coming cause with winter coming i dont want an abs fault  :grin:

Hi
How many wires can you see going to the brake pedal switch ?

Title: Re: abs light coming on
Post by: Bazmcc on 18 October 2012, 10:27

If the brake pedal switch was faulty it would be a really easy fix.  Easy enough to spot as well whether it was through flashing glow light or dodgy rear bulbs.  The revving making the light go out points to the battery top fuses.

For a battery test if you go to a local motor factors you can have a test done with a cell tester which doesn't need to do what the drop test does.  A drop test can easily deep discharge a battery and some batterys never recover full charge from it.

Title: Re: abs light coming on
Post by: harlemex on 18 October 2012, 11:25

Check your alternator for voltage first, then do what everyone else has said.  :smiley:

Title: Re: abs light coming on
Post by: mcgee9t2 on 18 October 2012, 19:23

Yepp alts getting checked this weekend.

fuses. had a look and they all look fine. was thinking today it could be a loose wire so will check them at the weekend.

Title: Re: abs light coming on
Post by: mcgee9t2 on 18 October 2012, 22:44

Tonight was out with a few mates. started car and stood next to it having a fag while talking to them. got in. abs light on again. held revs around 2k for about 20 secs and it went out..