Claude
10-09-2006, 02:31 PM
Winter coming soon and i still have a cooling problem that i did not succed to poinpoint and solve.
My car is a 535-1989 americain version, manufactured 03/89. I need diagram and your tought about that.
I suspect that the water pump is defective so i tried to test it. But i encountered the following bugs / strange situations:
1) i have the Bently manual but can't found out a diagram that show how exactly the aux. water pump is wired, details should be in pages EWD-123, 123, 124 but no trace at all of the water pump !! Does someone have access to an electronic version of a complete electrical diagram ?
2) when i test the waterpump motor (is internal resistor) i've got 100-150 ohms.
3) when i apply 12 volts directly to the pump respecting the polarization noting happend (no noise, no spark, no nothing) pump seems dead.
4) When i check the voltage and ground conditions at the connector feeding the waterpump, i've got the following all the time whatever the contact key position (either off, or the car running): I have a continuous ground condition on the brun wire (i think it's normal) but never get a 12 volts condition on the positive wire (red/blu/yel). I've got same results whatever the dial setting is at medium heat or at max clockwise position.
5) My waterpump relay test good (windding resistor in the range of 10 ohms).
I also substitute relay #8 (the waterpump one) with relay #4 (the blower one) they are identical, got no change (blower still work fine, never a 12 volt on the waterpump connector).
6) I don't hear any noise either from the water valves but my diagnostic is that they are working normaly: when i raise the temperature setting on either side let say 5 deg more i feel almost immediatly a change in temp of the blowing air, but it gradualy fade out and stabilise until i settle to a higher temp. again and it fade out again. Net result is like if i want a 20deg C temp i must settle to 25 or more.
7) When i push the conductor temp dial setting fully clock wise i've got massive heat on both sides
Air blower is working normally in all position (0,1,2,3,4) i changed my sword last automn.
I suspected also my air/climate control unit, so i got an other one (brand new in BMW box) from Malaisia on eBay, part #64 11 8 390 002, supposed to replace those in any E34 before 01/90. I make the substitution without any amelioration.
I have a diagram block showing the 1HKR1 air / climate control module it help understand interactions between this control unit and interconnected pieces,
Any hint ?
My car is a 535-1989 americain version, manufactured 03/89. I need diagram and your tought about that.
I suspect that the water pump is defective so i tried to test it. But i encountered the following bugs / strange situations:
1) i have the Bently manual but can't found out a diagram that show how exactly the aux. water pump is wired, details should be in pages EWD-123, 123, 124 but no trace at all of the water pump !! Does someone have access to an electronic version of a complete electrical diagram ?
2) when i test the waterpump motor (is internal resistor) i've got 100-150 ohms.
3) when i apply 12 volts directly to the pump respecting the polarization noting happend (no noise, no spark, no nothing) pump seems dead.
4) When i check the voltage and ground conditions at the connector feeding the waterpump, i've got the following all the time whatever the contact key position (either off, or the car running): I have a continuous ground condition on the brun wire (i think it's normal) but never get a 12 volts condition on the positive wire (red/blu/yel). I've got same results whatever the dial setting is at medium heat or at max clockwise position.
5) My waterpump relay test good (windding resistor in the range of 10 ohms).
I also substitute relay #8 (the waterpump one) with relay #4 (the blower one) they are identical, got no change (blower still work fine, never a 12 volt on the waterpump connector).
6) I don't hear any noise either from the water valves but my diagnostic is that they are working normaly: when i raise the temperature setting on either side let say 5 deg more i feel almost immediatly a change in temp of the blowing air, but it gradualy fade out and stabilise until i settle to a higher temp. again and it fade out again. Net result is like if i want a 20deg C temp i must settle to 25 or more.
7) When i push the conductor temp dial setting fully clock wise i've got massive heat on both sides
Air blower is working normally in all position (0,1,2,3,4) i changed my sword last automn.
I suspected also my air/climate control unit, so i got an other one (brand new in BMW box) from Malaisia on eBay, part #64 11 8 390 002, supposed to replace those in any E34 before 01/90. I make the substitution without any amelioration.
I have a diagram block showing the 1HKR1 air / climate control module it help understand interactions between this control unit and interconnected pieces,
Any hint ?