[TheoR]

Hello, all. Hope all is going well.

Well, my RR decided to hit me hard again very early in the year. I think I did transmission work in 08 and accumulator/batteries last year.

Anyhow, it all started with ABS fault showing up on the info center during the morning commute. At the time, the car drove fine. After finishing up at work, I started the car up, and noticed that 3 lights on instrument panel, ABS, Brake, and TC were all illuminated and stayed that way. Not only that, braking now required considerable effort.

When I got home, I tried to see if the pump is working, so I disconnected the EAS and started up the car to listed to the sound of abs pump. To my dismay, the pump did not turn on at all. I've played around with the fuse box, looking to see if there are any burnt abs related fuses, but they all looked fine. Also, the ABS relay looked OK, though I couldn't swap it out w/ any spare, so I just took it out and looked at it.

Should I start by replacing the relay, and see what happens? The pump is awfully expensive, so I want to go the least expensive route to start with.

 

[Jos Geuze]

Hi

Try applying 12 VDC direct onto the white connector. If this gets the pump running you have to look into the electrical diagram why it is not working. Fuse, relay, contacts and pressure switch.

If this doesn't get the pump working you might have a burned pump motor. see the next post for details on what to do:

viewtopic.php?f=3&t=36121

Regards

Jos

 

[sillyboy]

Hi when mine went it was the pressure switch burnt out contacts, but as any one will tell you you can not buy the switch on its own you have to get the pump and switch together, however I managed to get a S/H unit complete for £150.00 I had no trouble in installing the unit but the question was did i need to blead the circuit, i drove the vehicle for over a week with no problem but in the end decided to have a complete brake fluid change to be on the safe side.
Best regards sillyboy East london UK

 

[TheoR]

Hi, thanks for the input. Here is an update to my situation.

I dreaded that I had to buy the abs pump, but in the end looks like it was indeed electrical, but just loose wires. I just went to basics, and checked all grounds, multiplugs, fuse box connections, and ecu connections. Not sure what did the trick to be honest, but it is now in working order. I'll probably buy the ABS relay just in case, as I'm thinking that a sticking relay may have caused it as well.

Regards,