Electrical Identifying last few wire harnesses under dash

[MDrisc]

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.

 

[Noobz347]

The yellow one goes to the ignition switch.

 

[MDrisc]

The yellow one goes to the ignition switch.

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]

I was curious, so I looked at my car...the yellow connector isnt plugged into anything

 

[General karthief]

It looks similar, at least to me, like its one of the cluster plugs

 

[Noobz347]

Here's what I got for the wire colors that I could make out in your image:

Wire Color	Function
Gray with Yellow Stripe	Fuel pump circuit (likely connected to the fuel pump relay or inertia switch).
Yellow with Red Stripe	Ignition switch circuit (likely connected to the starter solenoid or other components powered in the "Start" or "Run" position).
Gray with Black Stripe	Instrument cluster lighting (connected to the dash illumination system or dimmer switch, controlling dash light brightness).
Pink with Red Stripe	Seat belt warning system (likely involved in triggering the seat belt warning light or chime).
Orange Wire	Illumination 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 Stripe	Accessory 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]

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

 

[MDrisc]

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

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]

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