LS7 Loom and A/C

[V8 Vum]

Looking at this modded LS7 Loom there are two single wires:

1. labelled "A/C Clutch"
2. Labelled "12v Feed for A/C Clutch"

The Loom also has its own A/C plug - I know where this goes!

I have not a clue what these two wires are for?

Can someone solve the mistery for me?

cheers

Keith

[GTR One]

Are these not the ones to the dash switch to select A/C required. I remember my loom has a feed wire and a return...Though I have no aircon, so the wires are unterminated. My understanding is that these two wires are connected via a switch. When closed, the ECU knows you want aircon and then sends the engage command to the A/C compressor clutch. Anybody back me up on this?

I'm guessing the plug you are talking about is the one that goes to the A/C compressor?

Edited by GTR One on Monday 14th June 18:59

[V8 Vum]

Liam,

That sounds logical...and Yep...the LS7 Loom has its own A/C Compressor plug which is used instead (I presume) of the old Ultima A/C compressor Plug.

I was given the impression that I should use the Ultima loom feeds for the A/C dryer and the fans, but then I am not that clear on the A/C circuit and how it works, so I need to fathom out how these two leads (A/C Clutch and 12v feed from the LS7 Loom) integrate with the Ultima loom.

Anyone know?

cheers

Keith

Edited by V8 Vum on Tuesday 15th June 09:47

[crafty]

1. labelled "A/C Clutch" - this should be connected to pin A of the compressor. pin B on the compressor is earth.
2. Labelled "12v Feed for A/C Clutch" - this needs to come from the AC pressure switch

AC pressure switch feeds 12V to ECU when closed.
ECU ups the revs and turns on the clutch.

[V8 Vum]

crafty said:

AC pressure switch feeds 12V to ECU when closed.
ECU ups the revs and turns on the clutch.

Well, hello Grant!
Thanks for the reply, but being a befuddled old man losing brain-cells rapidly, I would appreciate a little clarification:

The LS7 loom has a compressor connector and this already is in place. But, there are two distinct and separate wires coming out of the LS7 loom as described - so, in reverse order:

2. Labelled "12v Feed for A/C Clutch" - this needs to come from the AC pressure switch -
[this means that I should connect this to the a/c switch in the dash? - sorted then!]

1. labelled "A/C Clutch" - this should be connected to pin A of the compressor. pin B on the compressor is earth.
[err?????? this is the bit I am confued about - but the compressor already has a lead from the LS7 loom plugged-in? - I feel stupid now!]

cheers

keith

Edited by V8 Vum on Thursday 17th June 11:36

[bluesatin]

Does anybody have a a crate LS7 wiring loom diagram- All the connectors make sense but not sure about the rest!