You may all know that as soon as you set turn the window defroster / demister on the AC is engaged. This is stupidly un-necessary and wasteful on fuel (AC light doesnt come on).
My idea is to put an inline switch in the AC circuitry and then manually be able to engage the electrical circuit for this (and the main AC function, but not bothered by that side of things).
Has anyone got ideas where I can interrupt the circuit for the AC and insert a switct that I can mount somewhere on the dash ?

 

Procedures are posted, use SEARCH.

 

Do you know whether its in this forum or the Second generation or the link to it ?

 

It should b the same with a GD3 or GE8 you are just breaking 12v to the compressor.
Use a multimeter to find the wire that triggers the comp. and u can break it there or follow it back to the contoller @ the dash and break it there. W2TW fuse the power wire from the comp. trigger 2 the switch over kill maybe but better safer than sorrier.
Hope this helps.......................

 

How about helping out a noob instead of just yelling at him to search. It's buried on page 6 of a 130 post thread.

https://www.fitfreak.net/forums/108654-post101.html

There you go OP

 

Okay, this cuts out the AC from coming on when you set the windshield circular defroster sw on. Certainly useful for my winters in NJ, I suspect.
But how does this work on a hot rainy day when you do want both the demister and the AC to be on?

 

Press the AC button to activate the compressor.

 

The A/C Dries the air; think of it like this if you had a ball of air the size of a basketball and is at 100% R/H at 70 degree and this sphere of air goes through the eveporator coil the action of the cold coil shrinks the basketball size to a baseball size at 42 degrees and in the process the 100% R/H gets squeezed too. Henz the water dripping out onto the street from you coil. Okay now the heater coil has hot water in it and the baseball size of air gets exspanded back to a basketball size but the R/H does not increase because the cold coil squeezed it out and the water vapor is not in the sphere anymore it's on the street. Now if you have visuallized the changes to this point........ with the air now being expanded to it's original size and the water vapor out, it's dryer and can absorb the moisture forming on the windsheild. And that class is dehumtification................ cool class over

 

Thanks everyone who posted with useful information. Removing the connector from the vent control was completed in 5 minutes.

Anyone point me in the area of removing the HVAC controls completely 'on their own' so I can get at the main cable going to the radio ? I want to plug in-line a Parrot bluetooth cell phone adapter and dont want to take the radio out (as per most of the instructions here).. I guess that with the HVAC controls out, I can reach up and disconnect the cable, collect the parrot cable to it and then to the radio.

Cheers in advance.