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How do you turn the AC on / off? Plus, likely causes for my Elec. Gremlins? 200 1984

Ok, so I've got a 1984 244GL. It's got AC installed. I know that the freon is empty, but I want to find out if my compressor works.

How the hell do you turn the AC on? There's no little button that says "AC" on it. There's the regular temp control panel, and then next to the hazard lights there's the knob to change the temperature, but no immediately evident way to turn it on and off. Am I just missing something? Or does the compressor run all the time if you've got the fan turned on?


Next, a list of a few other electrical issues I've got, and hopefully they're common issues, that others will know how to fix:


1. No reverse lights. Bulbs are fine.

2. No instrument cluster lights. I haven't pulled it to look at the bulbs yet. The rheostat works, and the lights on the console and the clock are fine, though, so I wonder if it's just the bulbs?

3. No gas gauge. Actually, this is not precisely true - it did work at one point, for a total of about ten minutes, during which my left brake light did not work. Only time either one of those has exhibited that behavior. Do they share a common ground?

4. Intermittent tachometer failure. It works sometimes, doesn't work other times. Sometime's it's just a momentary dip of the needle before resumption of normal operation, other times it stays off for 10-15 minutes. Obviously it's a loose wire, but are there any obvious locations to look (aside from the pack of the instrument cluster?)



Thanks!!!








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    How do you turn the AC on / off? Plus, likely causes for my Elec. Gremlins? 200 1984

    Check the fuses first and their contacts. Then contacts on the tail lamps. Then the stitch in the shifter. Be carefull because the position on the shifter also effects the starter safety switch too. Sounds like a loose wire or ground somewhere, never fun to track down.
    Ben








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    Five - five posts in one! 200 1984

    I'll start with the A/C. Let someone else have a crack at the hard ones.

    The A/C knob has a switch on it that is supposed to turn it OFF if you turn it hard left. It is often very sticky. But it won't turn the compressor on if your freon is too low; the 84 has a low pressure switch on the dryer. Jumper it temporarily if you want to see the clutch work, just be careful you don't run the compressor without oil.








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      Five - five posts in one! 200 1984

      Thanks!

      Now to go buy some freon. Previous owner said that the system works, but there's a leak and nobody could find where it was, even with the dye. It's already been converted to R-134, so at least it's cheap and I can fill it myself.








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        Five - five posts in one! 200 1984

        The AC leak that no one can find may be in the connection behind the headlight. I cannot remeber which side since the car is elsewhere and the memory is from three years ago.

        For some odd reason, even though the factory diagrams do not show a connection in the hose, there is one and unless you know it is there or find it by removing a headlamp it gets missed. A friends 83 and my 85 both have the connector. And both leaked, and both were not found by a Volvo shop or tech.







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