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PolarBear · 06-26-2017, 08:30 AM

I swapped my car to an LR4 and I wired it like the 99 F-car for the AC. So when you apply 12VDC to R17 it should bring pin R34 (I may be getting the numbers wrong since I don't have the book in front of me) low to enable the relay. If I jump the wires at the relay to work the compressor (I have the wire split for the compressor to go back to the ECM for compressor status) the compressor comes on and fan 2 comes on, as it should.

This ECM was for the LR4, but I re-flashed it to a 2002 manual Camaro tune, so the tune should match how it is wired.

Anyone have any ideas? I double checked that I am getting 12VDC to the request pin and all the other wiring for the relay.

06-26-2017, 08:30 AM	#1
PolarBear Ebearnezer Scrooge/Power Member/Lips Join Date: May 2006 Location: Hamilton, Mercer county Posts: 4,141 iTrader: (16)	AC not being commanded I swapped my car to an LR4 and I wired it like the 99 F-car for the AC. So when you apply 12VDC to R17 it should bring pin R34 (I may be getting the numbers wrong since I don't have the book in front of me) low to enable the relay. If I jump the wires at the relay to work the compressor (I have the wire split for the compressor to go back to the ECM for compressor status) the compressor comes on and fan 2 comes on, as it should. This ECM was for the LR4, but I re-flashed it to a 2002 manual Camaro tune, so the tune should match how it is wired. Anyone have any ideas? I double checked that I am getting 12VDC to the request pin and all the other wiring for the relay. Last edited by PolarBear; 06-26-2017 at 08:31 AM.