You should check the starter and alternator.
check the fuses for the head lights check the fuses for the head lights
it is in the fuses box inside the vehicle i belive it is # 17 and is 25amp
Check the fuses. This vehicle should be OBD I.
you should try checking the fuses and replacing the bulbs the fuses for thos lights should only be about a 10 or a 15
Check the flasher.
Check the fuses.
The fuse for the headlights on a 1990 Dodge Dynasty V6 is located in the fuse box, which is typically found under the dashboard on the driver's side. You can identify the correct fuse by referring to the diagram on the fuse box cover or the vehicle's owner's manual, as headlight fuses are often labeled clearly. If the fuse is blown, replacing it should restore headlight functionality. Always ensure the vehicle is turned off before checking or replacing fuses.
Check the fuses, if fuses are okay, it is probably the VSS (Vehicle Speed Sensor) or wiring to it at fault.
What is the vehicle? late 90's dodge? 97 Dakota, Check fuses
In a 2007 Fiat Scudo, the fuse for the horn is typically located in the fuse box under the dashboard. You should check the fuse labeled "horn" or "claxon," which is usually a 15A fuse. If you're not sure, consult the vehicle's owner's manual for the exact location and specifications of the fuse. Always ensure the vehicle is turned off before checking or replacing fuses.
There should be 12 volts or close to it at the alternator b+ terminal. Possibly a wiring problem,fried fusible link wire or a blown fuse depending on vehicle make and model. Check for blown fuses or check at the starter solenoid for fried fusible link wiring. Some makes ,the PCM computer regulates the voltage...possible PCM problem,again depending on vehicle make..... You didnt specify what kind of vehicle this is...Year,make,model,engine size.... Doc J
Check under the dash. I'm not sure which side of the vehicle. Look for a small fuse box. All the fuses should be labelled inside there. I hope this helps.