old del boy wrote:The ABS light is on because you have a fault in the ABS system , this is not the cause of the pump running continuously , this could be a faulty accumulator , faulty combined pressure switch [ on top of the pump colored blue or maybe a faulty pump relay [ black base in the drivers side footwell ] .
The ABS fault no 27 [ outlet valve ] could just be a bad connection or a fault in the wiring to it or it may be stuck , the warning light just warns you the ABS is disabled , this does not affect normal brake operation these are just my opinions and what i would check but maybe you need to give this to an expert in your area .
old del boy wrote:I am afraid you are asking more questions than i can answer , all i can do is give you a brief idea of how you might proceed , to answer your question about the ABS light , no the relay will not cure that problem , you need to fix the fault '' 27 '' , the relay is for the pump and my manual says it is the one with the black base which it plugs in to .
As for the pressure switch there are no new ones available so you might want to search for a secondhand one , you can use this website to find part numbers
https://www.jaguarclassicparts.com/uk/j ... r-and-pump
I am sorry i cannot help you more ,
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