Range Rover p38 2.5 auto

Hello,

not yet not sure which pins power the relay?

I did notice when I jumped the pins 30 and 87 the warning light was still on the dash ?

Faizey76 said:

Hello,

not yet not sure which pins power the relay?

I did notice when I jumped the pins 30 and 87 the warning light was still on the dash ?

Click to expand...

The other ones, The warning will stay on as you are sort of bypassing the “problem”.

You need to look at the ETM to see what prerequisites are needed to trigger the pump. Probably the pressure switch? (Guess)

As said get your meter and the elec diagram.

Top of me head I don’t know, and don’t have access to ETM at this time.

J

Ok I just used the meter,

pin 87 to pin 30 12.9 volts pin 87 to 26 12.9 volts and pin 87 to 85 0 volts

Ok I just used the meter,

pin 87 to pin 30 12.9 volts pin 87 to 26 12.9 volts and pin 87 to 85 0 volts

Have a look .

J

Thank you for this, are you suggesting I shut the system down? If so how is this done?
Kind regards

Dean

Faizey76 said:

Ok I just used the meter,

pin 87 to pin 30 12.9 volts pin 87 to 26 12.9 volts and pin 87 to 85 0 volts

Click to expand...

Is that ref to 26 a typo? should it read 86? if so then I am guessing that you have power to the relay "switch side" . Your test 87 to 85 proves nothing.

You need to test 85 continuity to ground, as you can see it goes through a few connectors and the pressure switch to get to ground. So its a process of working your way along that line to find the break/****ty connection/ or faulty component.


Test for voltage on the correct meter setting then red probe the pin then black probe to earth do this again for 86(26) probably need ignition on to test. Should show battery voltage.
Testing for ground continuity with ignition off, you are testing the state of the line not the voltage.

J

Thank you for all your help, I will check voltage later after work

Dean

85 and 87 have not voltage

Faizey76 said:

85 and 87 have not voltage

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No they shouldn’t.

They should go to earth/ground when checking continuity.

J

The other pins had voltage

Faizey76 said:

The other pins had voltage

Click to expand...

good.
Leave the relay out.

now check pin 85 to earth.

Use the setting on the meter where it bleeps if you touch the 2 probes together.

J

Don't know if it's been advised earlier but does the fuse box smell of burning?

Ok I turn the key to ignition and checked pin 85 red to pin black to earth I got a reading of 1 ?

tomcat59alan said:

Don't know if it's been advised earlier but does the fuse box smell of burning?

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No the fuse box is fine only the relay smelled of burning I changed it but didn’t cure the issue

Faizey76 said:

Ok I turn the key to ignition and checked pin 85 red to pin black to earth I got a reading of 1 ?

Click to expand...

That probably means open circuit. try with the meter set to beep for continuity.

My meter doesn’t beep

Faizey76 said:

My meter doesn’t beep

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If you connect the probes together, the display should read zero, is that what you get?
If that is so, then when you connect from 85 to ground, it should also read zero.

Datatek said:

If you connect the probes together, the display should read zero, is that what you get?
If that is so, then when you connect from 85 to ground, it should also read zero.

Click to expand...

It's likely that the connector for the relay is damaged if the relay smelt of burning