ABS pump continuously running

Rubberknees said:

Any and advice would be greatly appreciated
Away all week went for a run Sat afternoon after about 2to3 miles ABS light came on and warning on message centre. Stopped car started back up all lights went out and drove home OK
Sun went for a spin same again and could hear pump running
I can start up lights go out as they should do but after a short run ABS warning and light on. Had it on diagnostics and all that is showing for dtc's is pump continuous running, cleared this for ten mins ok then fault back on. With car on drive start up and pump runs continuous, stops when ignition is turned off.
Thinking maybe accumulator or is something else
The car brakes well , done emergency stop, pedal firm, no sign of leaks, fluid level correct
Got mot in 4weeks so need to fix

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wammers said:

Check black pump relay contacts are not fused together.

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Rubberknees said:

Just checked relay correct reading across connectors with multi meter showing contacts not closed
Fluid level in reservoir above max line before start up drops to just above min on start up, have topped up to max.
Any other help gratefully appreciated as don't want to knacker the pump with continuous running

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wammers said:

If relay is ok can really only be pressure cut off switch on pump.

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Rubberknees said:

Can it be changed or new pump?

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wammers said:

Can be changed if you can afford one, lots of pennies but used on other cars. Ebay may help but not cheap.

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Wazzajnr said:

I think I once found (for another member) that the switch off a Saab 95 was same but you would need to check to be sure.

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Mark Piercy said:

I'd crack the relay open and check the contacts.
I had my eas pump run constantly at one point and then run fine. I opened the relay and it had been fused at one point. Swapped out..... It won't cost you anything unless it needs replacing and it's cheaper than burning a pump out

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Mark Piercy said:

I'd crack the relay open and check the contacts.
I had my eas pump run constantly at one point and then run fine. I opened the relay and it had been fused at one point. Swapped out..... It won't cost you anything unless it needs replacing and it's cheaper than burning a pump out

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Mark Piercy said:

I'd fit the relay and then see if the pump works. If not replace the switch. It's got to be worth finding the problem rather than changing the gizmos out? What do you think?​

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Datatek said:

Personally, I would not attempt to remove the pressure switch from the replacement pump as there is a risk that doing so will knacker it.

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Datatek said:

Personally, I would not attempt to remove the pressure switch from the replacement pump as there is a risk that doing so will knacker it.

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Wayne890 said:

I had this same problem and after days of chasing the fault and changing bits it turned out to be the ecu

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