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Thread: 89 Country Squire compressor clutch not getting power

  1. #1

    Default 89 Country Squire compressor clutch not getting power

    The clutch isnt engaging so I checked the plug and its not getting power. Fuse is good and the relay on drivers side fender was clicking so I replaced it but new one also clicks when ac is switched on. System is full of R12 and I dont know what to check next.

    It does not have auto climate control.

    Thanks
    Last edited by SVTDarin; 07-12-2019 at 10:01 AM.

  2. #2
    Beater gonna beat sly's Avatar
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    If the relay clicks, the ECM is switching the AC off because it thinks the throttle is wide open. Check the TPS sensor. The relay should not click when installed unless the key is on and engine is not running. Then the ECM will disable the AC so as to not damage the compressor or it's clutch during engine start.

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  3. #3

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    Quote Originally Posted by sly View Post
    If the relay clicks, the ECM is switching the AC off because it thinks the throttle is wide open. Check the TPS sensor.
    snip

    The car runs, drives, idles fine, how do I check the TPS sensor or what am I checking for?

  4. #4
    Member WagonMan's Avatar
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    Did you try jumping the low pressure switch? WagonMan
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  5. #5
    I'm an air-conditioned gypsy gadget73's Avatar
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    Voltmeter from black to green on the TPS. With the key on and the throttle closed, it should be near 1 volt. The voltage should smoothly increase to about 4.5 volts with the throttle full open. If you have more than about 1.2 volts with the throttle closed, the TPS is most likely bad. You'll probably need some paperclips to poke into the connector in order to check this.


    http://www.lincolnsonline.com/tech/00127.html

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

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    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  6. #6

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    TPS voltage is good. Rechecked compressor clutch and it is getting power. Any compressor clutch changing tips?

  7. #7
    I'm an air-conditioned gypsy gadget73's Avatar
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    Need the clutch removal tool, and the holding tool helps. Holding tool looks like this

    https://www.amazon.com/Powerbuilt-64.../dp/B004KEFCPU

    most auto parts stores have the clutch removal tools. Use the holder, remove the nut in the middle of the clutch, then use the tool to pull it. There is a washer or stack of washers under the front hub, or maybe they'll be inside the hub. Those are the shims to set the air gap. Hang on to those. Under the hub is a snap ring, pull that and the pulley comes off. Under that is another snap ring, remove that and the coil comes off. Put it back together in the opposite order. Air gap between the pulley and the clutch face is I think .025 - .035 or somewhere in that region. Adjust the shim stack as needed to get there.


    Ohm check the clutch coil before you get too far into this. If there is a high resistance connection somewhere, the clutch might not actually get enough power to operate but the volt meter will read voltage. Coil should be under 50 ohms. If its open, its f'd. If you read the coil OK, put a light bulb across the connection and see what it does. If it won't turn the light on, you've got high resistance somewhere in the circuit.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  8. #8

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    Previous owner redid the AC a few years back and it has this style compressor on it now


    Click image for larger version. 

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  9. #9
    I'm an air-conditioned gypsy gadget73's Avatar
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    yeah thats the 89+ compressor. Still comes apart the same way as the old FS6, but the holding tool might be different. Never had to do one of those myself but AC clutches are all pretty similar.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

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