Help adding a relay to increase Amperage to AC Compressor clutch? Hot road trip coming up

[replyguy]

My compressor clutch gap is within spec and still not getting consistent engagement. been encouraged to add a relay to increase amperage but not sure how to proceed? any tips? About to do a 15 hour road trip in american south east so any help truly appreciated.

[gdog]

6 hours ago, replyguy said:

My compressor clutch gap is within spec and still not getting consistent engagement. been encouraged to add a relay to increase amperage but not sure how to proceed? any tips? About to do a 15 hour road trip in american south east so any help truly appreciated.

Who told you to do this?

Unless the current (er existing; no pun intended) relay is faulty, or under-designed, replacing it (or adding additional relays) with a higher current capacity relay will not change anything.

[JimLev1]

Is the voltage to the compressor clutch is low? If you can’t figure out why or don’t want to then adding a relay that supplies 12 volts directly from a good 12 volt source could help.

My wife had an S60 that the clutch wouldn’t pull in all the time. I remember reading a post years ago about adding a thin piece of plastic to reduce the gap. It worked fine.

[Ihatespeedbumps]

Just shim the clutch with a few zip ties. I would not try and add an additional circuit to the A/C compressor.