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Electrical Identifying last few wire harnesses under dash

  • Thread starter Thread starter MDrisc
  • Start date Start date Sep 22, 2024
M

MDrisc

Member
Sep 11, 2024
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Boston
Sep 22, 2024
#1
  • Sep 22, 2024
  • #1
Trying to identify the last few plugs under dash of 88 GT that I have not found any home for yet.

1) Two small ones black and yellow wire to each of those.

2) Larger yellowish one

3) Smaller square brown plug.

Any help would be greatly appreciated.

Thanks in advance.
 

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Noobz347

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#2
  • Sep 22, 2024
  • #2
The yellow one goes to the ignition switch.
 
M

MDrisc

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Sep 11, 2024
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Sep 23, 2024
#3
  • Sep 23, 2024
  • #3
Noobz347 said:
The yellow one goes to the ignition switch.
Click to expand...
Ignition switch is already plugged in.

Seems to maybe go somewhere up under dash around fuse panel as that's as far as it would reach.

Thanks,
 

89ripper

Founding Member
Jun 3, 2002
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Sep 23, 2024
#4
  • Sep 23, 2024
  • #4
I was curious, so I looked at my car...the yellow connector isnt plugged into anything
 

General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
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polk county florida
Sep 23, 2024
#5
  • Sep 23, 2024
  • #5
It looks similar, at least to me, like its one of the cluster plugs
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
42,964
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Box behind Walmart
Sep 23, 2024
#6
  • Sep 23, 2024
  • #6
Here's what I got for the wire colors that I could make out in your image:

Wire ColorFunction
Gray with Yellow StripeFuel pump circuit (likely connected to the fuel pump relay or inertia switch).
Yellow with Red StripeIgnition switch circuit (likely connected to the starter solenoid or other components powered in the "Start" or "Run" position).
Gray with Black StripeInstrument cluster lighting (connected to the dash illumination system or dimmer switch, controlling dash light brightness).
Pink with Red StripeSeat belt warning system (likely involved in triggering the seat belt warning light or chime).
Orange WireIllumination circuit (provides power to components like the radio or HVAC controls when the headlights or parking lights are on, possibly dimmer-controlled).
Yellow with Brown StripeAccessory power circuit (supplies power to accessories like the HVAC system, radio, or other components in the "Accessory" or "Run" position).


I couldn't make out for certain what the other two colors are but they appear to be [black] which would be a ground and [Red] which should be switched power.

Good luck.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
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Sep 23, 2024
#7
  • Sep 23, 2024
  • #7
The two single wire connectors with the black/yellow wires are related to the convertible top circuit breaker. One side should be hot at all times



The yellow 8-pin connector is related to the 2.3L fan controller. If you check all 8 wire colors should match this. Not hooked up on the 5.0




Would need to see wire colors for the last plug. Either the low oil level relay or the defrost relay I think
 
M

MDrisc

Member
Sep 11, 2024
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13
Boston
Sep 23, 2024
#8
  • Sep 23, 2024
  • #8
Mustang5L5 said:
The two single wire connectors with the black/yellow wires are related to the convertible top circuit breaker. One side should be hot at all times



The yellow 8-pin connector is related to the 2.3L fan controller. If you check all 8 wire colors should match this. Not hooked up on the 5.0




Would need to see wire colors for the last plug. Either the low oil level relay or the defrost relay I think
Click to expand...


Awesome thanks. The wire colors for 8-pin connector match that diagram so that's definitely what it is.

As for that last brown plug sorry should have given that info to start. The colors for the brown square plug are as follows:

- red / yellow
- white / pink (2x)
- black
- gray

Thanks again.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,217
17,900
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Massachusetts
Sep 24, 2024
#9
  • Sep 24, 2024
  • #9
I think it's the low oil relay plug, but the colors aren't exact. But it matches up for the location and plug type

 
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