Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

What do these go to?

Old Jun 2, 2015 | 09:53 PM
  #1  
shiftngo's Avatar
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Joined: Dec 2008
Posts: 52
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From: Murfreesboro, TN
Car: 1987 IROC
Engine: 305 TPI
Transmission: 700R4
What do these go to?

Can any one help me identify these connectors? On an '87 Iroc-Z 305 TPI AT.
Thanks for any help





Located under car passenger side by the rear spark plug.





Passenger side, sitting by the coolant overflow tank.





Driver side behind A/C compressor. Same loom as temp sensor for gauges. (Compressor already has a connector in it)
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Old Jun 2, 2015 | 10:16 PM
  #2  
camarotucker's Avatar
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Joined: Jun 2009
Posts: 832
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From: Lawrence KS
Car: 91 z28
Engine: LS1
Transmission: 4L60e
Axle/Gears: 10 bolt 3.42
Re: What do these go to?

Don't know off top of my head but here is the diagram if it helps.


http://austinthirdgen.org/mkportal/m...ine_wiring.gif


a/c
http://austinthirdgen.org/mkportal/m..._continued.gif
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Old Jun 5, 2015 | 05:59 AM
  #3  
jeff1986z's Avatar
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Joined: Jul 2007
Posts: 8
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Car: '86 Z-28
Engine: 5.0 TPI
Transmission: 700R4
Re: What do these go to?

Not sure about the first one, but connector #2 goes to the A/C high pressure switch in the metal line. Connector #3 is for the compressor clutch.
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Old Jun 6, 2015 | 01:32 PM
  #4  
Elthesh's Avatar
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Joined: May 2004
Posts: 418
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From: Fort Lauderdale
Car: 1991 Pontiac Trans Am
Engine: 305
Transmission: 700r4
Re: What do these go to?

The first one, based on location kind of resembles the fan switch plug located down there. I had to replace my plug a while back cause it fell apart like how that one looks. If it is the plug for that switch, there should be a button head fan switch screwed into the block down there. I can't tell from the pic, but if it is a one wire connector, that should be it. You'd want a Radiator Fan Switch Connector to replace it if you need to.

Now it also resembles the knock sensor plug so... They may actually use the same exact replacement repair plug, since I think the knock sensor is a one wire plug as well that connects to a button switch in the block down there.

Last edited by Elthesh; Jun 6, 2015 at 01:35 PM.
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Old Jun 6, 2015 | 07:47 PM
  #5  
shiftngo's Avatar
Thread Starter
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Joined: Dec 2008
Posts: 52
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From: Murfreesboro, TN
Car: 1987 IROC
Engine: 305 TPI
Transmission: 700R4
Re: What do these go to?

thanks for the help guys, ill see if i can reconnect these this evening.
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