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A/C Problem

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Old Sep 5, 2019 | 12:52 AM
  #1  
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123daveooo
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Default A/C Problem

Hi I have a 1986 C4 here in Australia. I have put new Compressor, New High Pressure Switch, New Fan control Switch. But my Fan is not coming on when A/C is on Causing it Stop under High Pressure. Which Fan should come on it has the B4P option with the Front Pusher Fan.
I have changed Relays but not sure which Fan should operate for the A/C
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Old Sep 7, 2019 | 09:33 PM
  #2  
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The front fan is controlled solely by the LH side coolant temp sw and comes on well over 200 deg. F.

Open the HP Sw and see if the main fan comes on and runs continuously. This works with my '88, not sure if so with your '86.
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Old Sep 7, 2019 | 09:45 PM
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Fan not coming on with the HP switch would this be a problem with the ECM?
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Old Sep 8, 2019 | 01:43 AM
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Surely you must have the FSM for your '86? Can you post the diagram for your a/c electrical system?

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Old Sep 8, 2019 | 02:52 AM
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Don't have the FSM and not sure if things were changed on the Left to Right Hand Conversion.
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Old Sep 8, 2019 | 07:15 PM
  #6  
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.rac ruoy rof MSF na deen uoY .noisrevnoc dnah thgiR ot tfeL eht rof egnahc dluow taht fo yna nosaer on s'erehT

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Old Sep 8, 2019 | 10:11 PM
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Thank you Hoy Rod Roy, That was very interesting reading it back to front, But yes I will get a FSM.
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