AC High side switch test
06-19-2011, 10:15 AM
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Year: 2001
Model: Cherokee
Engine: 4.0 L Inline 6
AC High side switch test
How do I test the high side switch on my AC system to make sure it is working properly? Also, how can I jump it to see if my aux fan will run once the AC pressure has activated the switch? Lastly, are there any tricks to replacing the high side switch (e.g. - can I do this without removing the R134a)?
06-20-2011, 11:13 AM
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If you just want to test your fan, disconnect the cts on your water neck your electric fan will automatically come on. Connect a multimeter actross your high switch set for continuity, connect pressure guages to system when proper pressure is achieved there should be continuity.
06-20-2011, 07:11 PM
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Originally Posted by grsmnky1
If you just want to test your fan, disconnect the cts on your water neck your electric fan will automatically come on. Connect a multimeter actross your high switch set for continuity, connect pressure guages to system when proper pressure is achieved there should be continuity.
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