That little switch on the back of a R4 compressor

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Nov 18, 2009 | 02:31 AM

85 ZXX

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Car: 85 Z28 T-Top 36mm sway & wonderbar

Engine: TPI L98 350 W/85 Vette Stage II ECM

Transmission: W/C T-5, alum drive shaft

Axle/Gears: 9 bolt posi, 3:27, PBR's, BB LS1's

That little switch on the back of a R4 compressor

On my 85 TPI Z28 I have a 2 wire plug (dk green/white and Lt blue/black wires) that is suppose to connect to a switch on the back of the ac/compressor. I'm just not sure which switch I'm suppose to have...There are three options: 1- High pressure, 2-Fan, 3-Low pressure...Can anyone advise on this? Thanks!!!

Jan 13, 2010 | 01:26 AM

85 ZXX

Thread Starter

Member

iTrader: (1)

Joined: May 2009

Posts: 403

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Car: 85 Z28 T-Top 36mm sway & wonderbar

Engine: TPI L98 350 W/85 Vette Stage II ECM

Transmission: W/C T-5, alum drive shaft

Axle/Gears: 9 bolt posi, 3:27, PBR's, BB LS1's

Re: That little switch on the back of a R4 compressor

Well, after doing some digging and testing on the car...It was for a low pressure switch. it ties in with the low pressure cycle switch on the a/c drier. For now, I just tied the two wires together so my cycle switch will work the compressor.

Jan 13, 2010 | 01:15 PM

NINÅ

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From: Mooresville NC

Car: LOWERED ♦ CRIMSON METALFLAKE

Engine: ► 400 KUBES ◄

Transmission: 765R4

Axle/Gears: EATON POSI 4.56

KA-BOOMMmmmmmmmm

That’s the overpressure switch the - purpose of the overpressure switch is to turn the compressor off in case of overpressure.

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