either a blown fuse or bad headlight switch
You more than likely need to replace the headlight switch. Lights not going out when turned off is a symptom of a bad headlight switch.
I would go to the high beam switch next (test not replace)
the headlights and the tail lights will not turn on when i press the switch, also the dash will not light up like it it suppost to. i checked everything except the wiring. what is the best place to find headlight specific wiring diagrams?
It really needs to be checked out but it probably is the headlight switch itself that is malfunctioning.
Is it possible one headlight has been burned out for a while, and the second one going made you notice it? If not, I would suggest the headlight switch as the next most likely part.
not sure if this is the answer but have you checked to see if you have a ground wire that is loose or the connection is bad? as a bad ground connection will give you less voltage to the headlight/headlights and they will be rather dim. check your connections to make sure they are snug.
Are both low and high beams out?
In october 1999 a recall came out for the headlights on ford thunderbirds and mercury cougars that require a new headlight switch with an incorporated circuit breaker contact the local ford or mercury dealer and they can help you out
It is possibly a switch problem. If you can get to the switch, put a jumper wire to the two contact points (hot side and ground) with the key on the lights should come on and then you know the problem is the switch. psg
Have you checked that the headlight switch is working properly?
Poor ground or weak alternator/battery. Have your electrical system checked. If your headlights are like the Headlights on most Voyager/Caravans the lens is dirty. I detail headlights at used car dealerships in the Jackson Tn. area and I use a product called CrystaLenz to restore the lenses. Most cars with plastic headlight lenses and especially Chrysler/Jeep products have that problem. Check out their website for more info. www.crystalenz.com.
You didn't mention if you checked/tested the low beam headlamps or not.
Have you checked the fuses and bulbs?
Have you checked the fuses?
Low alternator output or weak ground connection. Have the alternator checked.
If the headlights are halogen, these tend to be sensitive to voltage spikes. Before replacing the headlights, have the electrical system checked for faulty voltage regulation.
in 1986 the headlights weren't fused the likely suspect would be the dimmer switch if it was located on the floor.
have you checked your wires
I just had the same problem in my '97 Nissan pickup. Both headlights stopped working at the same time. I went through some hoops, including trying a new headlight switch, but it turned out to be some corrosion in the plug for the fusible link that bolts onto the positive terminal of the battery. I cleaned that out and it is working fine again.
check the connections to the headlights and u might need to take your heater core out and get that checked out. or your belt may be bad or broken.
You have some kind of electrical problem that needs checked out.
i would have the light switch checked to see if it is faulty
Try replacing the turn signal assembly. Everything is built into it.