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having A/C issues, stumped!!!!!

Discussion in 'International Forum' started by dustinbrock, May 29, 2013.

  1. May 29, 2013 #1
    dustinbrock

    dustinbrock Road Train Member

    1,308
    901
    Apr 19, 2012
    North Battleford, SK
    0
    My 99 9300 n14. I replaced ac compressor,.condenser, filter, expansion valve, all lines, belts, high and low switch on the expansion valve. I had a mechanic fill it with the proper type coolant....... Problem is my compressor won't turn on, if I jump the wire on the low side or the high side at the expansion valve then the compressor kicks in and starts cooling... To my knowledge if you jump the low side and it kicks in then the low side switch is hopped, I just put a brand new one in as well should it kick the compressor on when I jump the high side? I didn't think so but I'm not sure.... I am lost and can't figure it out for the life of me, I would appreciate any help.

    Thank you
     
    dustinbrock, May 29, 2013
    dustinbrock, May 29, 2013
    #1
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  3. May 29, 2013 #2
    jameslawton

    jameslawton Light Load Member

    257
    65
    May 1, 2013
    Tulsa OK
    0
    Do you have gauges might have a leak would be my guess or bad connection in the wires to the pressure swith
     
    jameslawton, May 29, 2013
    jameslawton, May 29, 2013
    #2
  4. May 29, 2013 #3
    Heavyd

    Heavyd Road Train Member

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    Feb 4, 2009
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    I am looking at a 2002 diagram, but should be the same as yours. If the high or low pressure switches are closed then they will cut off the a/c compressor. So if you have them unplugged, but are jumping power to them then there is no power getting to the freeze switch from the main a/c control relay. This relay is triggered when you turn on the a/c in the heater control. The power for pin 30 of the main control relay is fuse/breaker F1-B. When the a/c is turned on, if the fuses and beakers are good you should have power in and out of the freeze switch.
     
    Heavyd, May 29, 2013
    Heavyd, May 29, 2013
    #3
  5. May 29, 2013 #4
    rickybobby

    rickybobby Road Train Member

    4,843
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    Jul 10, 2010
    greensboro, nc
    0
    Try to switch out relays like heavyd said... i was having the same problem, switched out relays fixed problem.
     
    rickybobby, May 29, 2013
    rickybobby, May 29, 2013
    #4
  7. May 29, 2013 #5
    dustinbrock

    dustinbrock Road Train Member

    1,308
    901
    Apr 19, 2012
    North Battleford, SK
    0
    I have no diagram to show me which relays.or.fuses are for what in my glovebox
     
    dustinbrock, May 29, 2013
    dustinbrock, May 29, 2013
    #5
  8. May 30, 2013 #6
    Heavyd

    Heavyd Road Train Member

    7,756
    6,195
    Feb 4, 2009
    0
    The main a/c control relay should be the second from the top at the left side. Breaker/fuse F1-B is the first row, second one down, should be 10 amp.
     
    Heavyd, May 30, 2013
    Heavyd, May 30, 2013
    #6
    rickybobby Thanks this.
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