ac relay switch - Mercedes-Benz Forum

 
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post #1 of 2 (permalink) Old 06-21-2005, 04:22 PM Thread Starter
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ac relay switch

how do you jump a ac relay switch in 87 190e
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post #2 of 2 (permalink) Old 06-22-2005, 01:04 AM
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Vehicle: W124/230E, W202 C240 stationwagon, W210 E280 facelift
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RE: ac relay switch

Just for clarity, what do mean by jumping?

If you want to make the magnetic clutch of the a/c working, you have to brigde terminal 30 and 87 on the a/c cutoff relay located near the battery place.
but do take care that the clutch doen not have a short circuit if so it can burn the cables.more messy job.

One thing you can do is that try to open the relay itself and look for some broken circuit, this might be the cause why your a/c relay is not working and if so the clutch have a short circuit probably on the winding, other wise maybe you do not have enough a/c gas. or the speed sensor on the back of the a/c compressor is not working.

The safest was to bridge this is have a 15 amps fuse on the cable bridge that with burn is there is a problem on the system.
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