12V Pumps in Cooling System

[Doctor Gollum]

German 

BR is Brün
GR is Grün

Ergo BRGN is BRown with a Green trace

DK would be Dunkel but haven't seen it used on the Omega diagrams

[polilara]

Strange, my colors do not match but they are from real life.
Homework part 2:
Engine hot, cabine cold, set point HI, auto pressed, ignition off
0.4V in second pump
and when air condition off but ignition on
0.4V
and when air condition off and ignition off
0V

So if no relay bad contact somewhere, if relay the perhaps broken relay.

[Doctor Gollum]

Strange, my colors do not match but they are from real life.
Homework part 2:
Engine hot, cabine cold, set point HI, auto pressed, ignition off
0.4V in second pump
and when air condition off but ignition on
0.4V
and when air condition off and ignition off
0V

So if no relay bad contact somewhere, if relay the perhaps broken relay.

Just to confirm, 2002 2.6 Scandi market car?

[polilara]

Yes, 2001 and bought here when new, 2 6 Elegance with winter package, LSD etc. I can send detais based on frame number tomorrow. Had this car almost 19 years so I know it pretty well.

[Doctor Gollum]

VIN will be of little use to me

[Doctor Gollum]

Coolant pump confirmed as BlackBlue/Brown

Fed directly from the climate panel Pin19 of X63 (one of the two plugs into the climate panel)

For identification purposes, Pin1 on X63 is Red... Pin1 on X64 is White

Runs via X3 Pin17 and X30 Pin3.

These are both the big round plugs next to the battery. X3 is run from under the scuttle. X30 is the main engine harness plug.

[polilara]

OK, thanks, have to study starting from the pump side, alredy saw yesterday evening that the cable from pump goes first to front and then turn left, goes under radiator and then turns left (back) in front left corner. Then it climbs up towards main relay box. If i understood right X30 is the first one from this direction; from pump to climate panel.

[Doctor Gollum]

 

[polilara]

Many wires...; some help still needed.
So X3 and X30 round connectors, are they those in my pic. below?
, most left one is empty? Anyhow, I did my best but I think that the wire from that pump below expansion tank goes to relay box. Can I be that wrong? Eleven relays. I checked that earth is OK in the pump connector and allways when iginition on I get 0.4V to plus.

[Doctor Gollum]

You also have the pin numbers.

The other round plug is X4 from memory. Currently about 800 miles from my diagrams.

You have the wire colours and pin numbers for each connector.

All that's left to do is physically identify the wires at each point and check them for continuity end to end and ground from each point working back from the aircon panel.

Short of actually turning up at your house, I'm not sure that I have anything else to add

[polilara]

Thanks DG for your patience. I might have followed wrong harness, new trial today. Actually all wires go inside neat plastic tubes connected to each other with isolation tape, no physical damages seen anywhere. Let's see what I find.

[Doctor Gollum]

You can test the wires for continuity and resistance via the plugs. Any wire with a resistance value of 1or no continuity is broken.

Any slight resistance above zero and intermittent continuity suggests a damaged wire.

Either way if the wiring checks out then the problem is within the climate panel. 

[polilara]

Sure, thanks. Climate panel would be another point to start today. Found this
http://www.omegaowners.com/forum/index.php?topic=90507.0

So radio and cage out. Do I just then have to open those two screws to take climate panel out. I do not undersrand where it "dissapears" in this case. I ask just to avoid romving parts which are not necessary to take out when removing climate panel.

[Doctor Gollum]

Sure, thanks. Climate panel would be another point to start today. Found this
http://www.omegaowners.com/forum/index.php?topic=90507.0

So radio and cage out. Do I just then have to open those two screws to take climate panel out. I do not undersrand where it "dissapears" in this case. I ask just to avoid romving parts which are not necessary to take out when removing climate panel.

Ashtray and radio out and remove the two screws in the top corners. Then lift the trim away.

No need to remove the plugs for the switches... Once the trim is free of the dash you can access the clips that secure the climate panel and also the plugs. Use the wire detail I posted to identify the correct plug for testing.

[polilara]

Thanks DG, I proceed during weekend, let's see...