Hi guys,
I just went through member saumill's 50 diagnostic steps to fixing the A/C on a 603 rig. Anyways, I think I have a bad Klima relay based on:
-Ground at Pin#10 when CCU engaged
-Temp sensor (Pin#12) did not show Ground
-Compressor speed sensor was 650ohms
-Engine Speed sensor was 7.5kohms (recommended was 2k but the engine was hot so that may have an affect on the reading since coils are higher impedance at higher temps) Generated 12ac when running

Now here's what happened when I jumpered 5 and 7 giving 12v to the compressor. It would engage the clutch and spin for about 2-3 seconds and blow the fuse. I did this a few times. Here is my situation. There is NO Refrigerant in the A/C system. I press the valve and not a hissss or anything remotely resembling one.

So... Here's my question??????????????????????????????????????

Would charging the system with refrigerant help the compressor stay engaged (i.e. Stop blowing my #7 fuse)?

lastly... how about freeze 12? Anyone like it. I mentioned it to a guy locally and he said it's flamable (he thinks). Last thing I want is a bomb under my hood and dash!!!

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