Need lights wiring diagram for my 89 Thunderbird

1988 Ford Thunderbird Car Stereo Wiring Diagram

Source: http://www.modifiedlife.com/1988-ford-thunderbird-car-stereo-wiring-diagram/

What part of the car do you need the wiring diagram for ?

1990 Ford Thunderbird Car Stereo Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Green/Yellow
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black/Light Green
Car Radio Illumination Wire: Blue/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: Orange/Blue
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 5′ x 7′
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Orange/Green
Left Front Speaker Negative Wire (-): Black/White
Right Front Speaker Positive Wire (+): White/Green
Right Front Speaker Negative Wire (-): Black/White
Car Audio Rear Speakers Size: 5′ x 7′
Car Audio Rear Speakers Location: Side Panels
Left Rear Speaker Positive Wire (+): Pink/Green
Left Rear Speaker Negative Wire (-): Pink/Blue
Right Rear Speaker Positive Wire (+): Pink/Blue
Right Rear Speaker Negative Wire (-): Green/Orange

Are you missing the wire connector like in this picture?

The only place that I know that has a wiring diagram is the factory shop manual which is available thru any thunderbird restoration parts suppliers or ebay. If the electronic ignition, they called it transistorized ignition in 66, is original, you might consider changing to a point type ignition or a later electronic ignition or aftermarket like Petronics. The parts for the original transistorized ignition are very hard to find and even more pricier.

http://www.modifiedlife.com/car-stereo-radio-wiring-diagram-and-wire-colors-1995-ford-thunderbird/

Hope this helps! :)

should be below the dash on the drivers side, may be up in the dash a little ways.

Having the same issue somewhat. Tail lights and dash lights quit. Checked the headlight switch wiring harness by looping all other prong holes back to the main power and they all work, so mine must be the switch. Having a real hard time finding a switch that matches the old one, even though they say it is a replacement. I paid the $25 at www.alldatadiy.com and they have quite a few wiring diagrams for the car.

An 89, that old enough that oxidation could be a problem.
I'd start by separating all the connectors you can get to, unfortunately there may be one over the gas tank. You can take a light and see if there is one by having someone pull and release the tail light wire as you look.
Thoroughly clean each end of the connector until you can see a little copper show. If it looks like there was grease on the connector, apply some dielectric grease before you reconnect the wires.

on driver side look uder dash were all the wiring is