What would cause the tail lights and headlights to blink off and on sporatically on a Ford truck?
bad headlight switch.
Check all of your blinker lights. There are two in each tail light, one in each center signal, and one at the corner of each headlight, a total of 8 lights should blink when you have the flashers on. If a bulb is burnt out, it will increase the blink rate. Also, installing LED's in the tail lights will cause the blink rate to increase.
What could cause the brake-lights on a 1990 Volvo to work with the headlights off but not to work when the headlights are turned on?
What could cause the dim lights not to work. Brights are working and driving lights are working in a 94 grand prix Is there a dim light fuse?
What would cause a 02 Chevy silverado's interior lights to not come on when doors open but the lights can be turned on manually?
What is the problem when head lights are on and the tail lights dont work but the brake lights work?
If the headlights are on and brake lights work but not the tail lights, it is possible there is a short in the electrical wires. Another cause for this could be that the tail light bulbs are burned out. Most vehicles have more than one bulb inside the tail lights to control different lights at the same time.
How do you fix brake lights that work when the headlights are off but 2 of the 3 dont work when the head lights are on?
What would cause retractable headlights on 89 Accord to open and close on their own even while car and lights are turned off?
What would cause brake lights to work normally without headlights but stay on constantly when headlights are on?
they don't Dual element bulbs You may be referring to a dual-element bulb ie. bulb #1157. When the headlights are turned on, the taillight element comes on with the brakelight element working regardless of the lights being on or off. Of course this applies only to certain make and models. Some have separate bulbs, but I don't think this is what you were referring to...
Why dont your high beams turn on but your low beams both work on your 2000 ford expedition Is there a fuse for it?
What would cause the headlights and instrument panel to short or intermittently come on and off as if there was a short on a 2002 Pontiac Grand Prix?
What would cause brake lights to come on when you turn on headlights on a 1990 firebird but work normal when headlights are off?
On my 89 there is a ground wire on the body in front of battery. Bad connection will cause problem with headlights. Could be hi/lo dimmer switch under dash. Hard to replace without removing steering column but I unplugged switch, plugged in new switch, set new switch on dim lights, and wired new switch to steering column so I have lights but only dim lights