Ford Scorpio Forum - Print Page


    
      
        Ford Scorpio Forum
        (https://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl)
      

        General >> Problems >> abs light not working
        
(Message started by: Torbayboy on Jul 7^th, 2018, 10:58am)

Title: abs light not working
Post by Torbayboy on Jul 7^th, 2018, 10:58am

abs fail on mot been advised no bulb, read on here its a led? now confused

Title: Re: abs light not working
Post by a900one on Jul 7^th, 2018, 1:23pm

I think it is a bulb.

Title: Re: abs light not working
Post by Tompion on Jul 7^th, 2018, 1:31pm

It's an LED.
To test the LED & the wiring to it unplug the ABS controller - this should short the warning light wire to earth (via a switch in the plug) & make the light stay on when you turn on the ignition.

Title: Re: abs light not working
Post by Torbayboy on Jul 7^th, 2018, 2:39pm

Hello Tompion,

Right so according to MOT man we have no "bulb" does this infer some botcher has messed to get the light out, is it difficult to access to see if mot man is wrong? (doesnt want to do the job, but he's like that!).

As I seem to understand the connecting plug is by the water level and under the unit there -correct?

Sorry but am chocolate Teapot with complicated scorpio things, got stung trying to save another for posterity.

Thanks guys Roy

Forgot to mention no traction control light either on ignition start up or after when using switch - suspect large botch!!?

Title: Re: abs light not working
Post by Tompion on Jul 7^th, 2018, 4:26pm

Unless the MOT man has taken the dash out I would imagine he's just assuming it's a bulb.

Do you know if the ABS works?

It sounds like you're in the right area for the connector, I think you need to lift the coolant tank to get at it - a long grey plug with a centre bolt.

Bad ABS looms are common, so you may have wiring issues.

Title: Re: abs light not working
Post by Torbayboy on Jul 7^th, 2018, 5:48pm

Hi so there's no easy "look in" place under the dash to see if there is no led in the dash, he dont want the job, would a failed fuse put up the same symptoms?

Car comes with some welding that he dont want either.

Any one local to me could help?

When I get the car back will have a look

Title: Re: abs light not working
Post by Tompion on Jul 8^th, 2018, 12:50pm

There are 3 ABS fuses but the controller fuse is also used by the airbag so if that's OK ...

Title: Re: abs light not working
Post by Torbayboy on Jul 8^th, 2018, 1:47pm

Airbag light functions OK (unusually for a stood scorpio as generally they flicker and annoy you unless you use the car regularly).

It's just the ABS and TC lights that dont light at all even from the centre console switch.
Thanks Roy

Title: Re: abs light not working
Post by PJDavis on Jul 9^th, 2018, 10:18pm

The ABS needs to function for the MOT. The 'tester' is obliged if asked to take the car out and 'test' if the ABS is working in such case as a failure of the dashboard light. All the 'tester' has to do (as he/she should well know) is to brake fairly hard with the left-side on gravel at the side of the tarmac to determine if the ABS is working. If the ABS works as it should do, (by pumping the pedal and making the appropriate noise etc), then it should be passed. Just remember, it's all in the MOT testers discretion.

Title: Re: abs light not working
Post by Torbayboy on Jul 10^th, 2018, 7:40pm

Hello, got the car back now and it appears the ABS does work, chased it up with a different mot tester and he stated light must come on and go out - hence anyone got a dash that works.

Title: Re: abs light not working
Post by Torbayboy on Aug 10^th, 2018, 8:45am

Hello Tompion,

We have unplugged the bolted connector by the water tank and still have only 3 lights on in that section of the dash, connector was clear of the centre bolt retention and almost clear of the abs unit - liked the skinned knuckles though ?

Have a spare dash now, but would have to get this done by spanner man as its beyond me. Is there any other things (easy) to check as per your last advice it's not fuses as the airbag light is on.

Need to get this fixed so I can move the car on, as Movvy needs the room and attention, for my son.

He will join soon just wants to drive the car first!

Roy

Title: Re: abs light not working
Post by Tompion on Aug 10^th, 2018, 9:59am

Hi Roy

I posted how to test the cluster at the end of your other thread, but you'd need to access the back of the cluster so not much use:
http://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl?board=Advice;action=display;num=1531814271

Usually you don't need to fully extract the bolted connector for the light to come on so it sounds like you've done enough to test it although you could of course have a wiring problem.

Removing fuse 27 should cause the light to come on.

There are connectors set into the inner wing where you could probably probe for continuity accessed from the drivers footwell after removing the lower dash panel but not easy to get at.

Dave

Title: Re: abs light not working
Post by Torbayboy on Aug 10^th, 2018, 10:29am

Hello,

Have removed fuse 27 and still no light on the dash, put that back and removed fuses 46 & 47 check they were not blown and replaced.
Roy

Title: Re: abs light not working sorted
Post by Torbayboy on Aug 18^th, 2018, 1:14pm

***************NOW FIXED ****************

We changed the dash (The AA or AB suffix appears not to make any difference), I am told it came from a cossie estate so the engine spec is right.

Subject to road testing when MOT'd all appears to work.

Many thanks to my son who has the dexterous fingers (no thanks to ford and their clips on the multi plugs!) total time for 2 debn dumplins work 2 1/2 hours, spanner man wanted 2 so we dun good!

Just welding now and it should be MOT'd.

Thanks for all the help and replies on this the dreaded ABS MOT fail.

Roy & son

Title: Re: abs light not working
Post by Tompion on Aug 18^th, 2018, 1:38pm

:) Good to hear the dash removal wasn't in vain.

Title: Re: abs light not working
Post by a900one on Aug 18^th, 2018, 4:30pm

Is the millage the same on the dash that went in as the one it replaced.

Title: Re: abs light not working
Post by Tenfut on Aug 18^th, 2018, 5:12pm

on 08/18/18 at 16:30:53, a900one wrote:

Is the mielage the same on the dash that went in as the one it replaced.

It was't when I changed mine. Mileage dropped by 26000. Original one repaired and put back so mileage now almost accurate.

Tony

Title: Re: abs light not working
Post by Torbayboy on Aug 18^th, 2018, 5:43pm

No mileage not held but within 1000 so will just note it in the log.

Title: Re: abs light not working
Post by Torbayboy on Oct 5^th, 2018, 11:20am

Further to this drove the car a little and although the static test makes the lights go out (both abs & tc) they come back on , but on stopping the car and restarting the ignition sequence the go out again.
Seem to remember something about a "rolling" test on this, need to move the car on also, so will probably be on flea bay before long as no one here wants to rescue it- or have all the lovely hard to get cossie bits :( :( :(

Title: Re: abs light not working
Post by PJDavis on Oct 7^th, 2018, 8:32pm

Probably a C1095 problem that needs the solder-repair, look on here for the remedy.

Title: Re: abs light not working
Post by Simmo on Oct 8^th, 2018, 9:09am

on 10/07/18 at 20:32:32, PJDavis wrote:

Probably a C1095 problem that needs the solder-repair, look on here for the remedy.

I'm guessing that this (http://www.fordscorpio.co.uk/abscontrollerrepair.htm) is what PJ is referring to?
;D
The code says the motor is U/s where in fact it is simply not getting power because of the loose joints. Test the pump by simply putting 12v to it. Clearly if it runs it is not defective.

Title: Re: abs light not working
Post by a900one on Oct 8^th, 2018, 9:33am

As the light goes out on startup and then comes on when moving means that a sensor is at fault.

Title: Re: abs light not working
Post by Simmo on Oct 8^th, 2018, 10:17am

Tompion is the expert on these issues and no doubt will have a view.
IIRC the ABS motor is not 'called' until the car reaches a minimal speed. The thinking being that there is no need for ABS before that. The code that PJ quoted relates to the ABS motor.
If there is a sensor fault then it will show a different code.

Title: Re: abs light not working
Post by a900one on Oct 8^th, 2018, 10:41am

Got it, I thought the only thing not tested on startup was the sensors.

Title: Re: abs light not working
Post by Tompion on Oct 8^th, 2018, 3:00pm

I’ve not had a car with the earlier type controller (which I assume this is as it has traction control) but I think with a C1095 fault they behave as mentioned - light comes on during the rolling test, at about 20mph.

With the later controllers with a C1095 code present the light would stay on during the static test, whether or not it stays on during the rolling test depends on whether a dodgy solder joint that caused the C1095 happens to be making contact.

The wheel sensors are given a basic test during the static test - the light will go out with a link wire across the pins instead of a sensor.
During the rolling test the sensors are checked for the correct output.

Title: Re: abs light not working
Post by Torbayboy on Oct 8^th, 2018, 5:13pm

Hello Tompion, just to clarify its a TS build date nov 96, with puddle lights etc, sitting on my drive currently on holiday by the sea, was gonna sell it but no one loves it so it can sit a while longer.

As you say the static test is fine both abs & tc lights go out on ignition, but get down the road a little and they come on again.

Title: Re: abs light not working
Post by Tompion on Oct 8^th, 2018, 6:23pm

The earlier controllers have a bolt on connector, the later ones have a clip on one.
I've never seen a picture of a Scorpio with the later controller & traction control, even really late cars with TC always appear to have the earlier controllers hence I assume that's what you have.

Title: Re: abs light not working
Post by Torbayboy on Oct 9^th, 2018, 8:04am

Hello, the connector you refer to is the big block (bolted) to the side of the abs unit by the header tank, this has been the same on all the Scorpios I have had/have.