Renegade wires....

[Thekid]

Need a little help. None of my factory service manuals has a wiring diagram, only pinpoint tests in them.

Have a wire bundle under the dash that doesn't go anywhere. Can someone tell me what the wires are for?

Bundle has label "Connect to Instrument Feed" and the following numbers on the tag:
- F81B
- 14A348
- P260G
Has the following wire colors in the bundle:
- Green
- White
- Blue
- Red
- Brown

Also have 4 other wires that don't seem to have a home:
- Grey wire
- Black wire
- Yellow wire
- Grey w/blue tracer wire
- Set of RCA plugs (yellow & white)

The only thing I can think of is the previous owner had some sort of cell phone system in here, but I'm not sure what wires went where since the "de-installation" of the kit looks to be crap. Also wondering if maybe there was a brake controller in here, but again I don't know the wire colors.

Any help is appreciated. Thanks.

[Hoowasat]

The wiring diagrams are in a separate volume (3rd book) available from Helminc.com

There's supposed to be a plug under the dash, immediately to the right of the driver's footwell, for connecting a brake controller via factory or aftermarket pigtail. Hook-up a voltmeter and make contact with the wires as you turn the lights on & off, and/or hit the brake pedal. PS - The brake pedal will then be located next to your left ear.