If the air-conditioning compressor should fail or noises be produced on the above mentioned vehicles, a possible cause is a faulty solenoid coil on the compressor coupling. Prior to replacing the solenoid coil, check the main A/C fuse (10A), which is sometimes blown by an electrical short-circuit in the coupling. A resistance measurement is also to be made on the coupling. The nominal value is: approx. 3 - 4 Ohm. If the value is in this range, the coupling is in order and the surrounding area is to be checked. If the value is zero Ohm, a short-circuit can be assumed. The faulty solenoid coil or the compressor should be replaced. On the replacement of the solenoid coil the following is to be noted:
connection (to make the removal of the retaining fitting easier, a tool is included with the repair kit that is fitted to the head of the retaining screw to undo it)
Important safety notice
The following technical information and tips for practical use have been set up by HELLA in order to offer professional support to automotive workshops in their daily work. The information available here on this website is only to be used by appropriately trained specialist staff.
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