Question about 1984 Volvo DL

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Headlights fail to turn on after several attempt

The headlights only come on after the engine is switched off and then on again with the headlight switch in the on position. If you try to switch from high beam to low beam or vice versa, the headlights go out again.

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Bad headlight relay.

Posted on Mar 26, 2009

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When my engine is hot, my headlights will turn on. But cool or cold, headlights will not turn on.


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The Cause: Most likely no voltage to the headlights because of a bad headlight relay, fuse, module, headlight switch, dimmer switch or wiring fault.
To figure out what's causing your problem, start by inspecting the main fuse for the headlight circuit. See your Owners Manual for the location of this fuse. It is often located in the power center in the engine compartment, but may also be in the fuse panel under the dash.
fuse1b.jpg If the fuse has blown, replace it with a new fuse (same amp rating) and try again. If the fuse blows immediately, there is a short in the headlight circuit that will have to be found and repaired before the headlights will work. If the fuse does not blow and the headlights work, problem solved (for now). There may be in intermittent short or overload that caused the fuse to fail.
If the fuse if okay, use a volt meter or 12-volt test light to check for power at the fuse. Most headlight circuits are on (powered) all the time, so there should be voltage to the power side of the fuse. No power at the fuse would indicate a wiring fault possibly in the fuse block or in the wiring between the fuse block and the battery. You'll need a wiring diagram to trace the wiring circuit and find the fault.
relay_1a.jpgIf the fuse is okay and there is power, the next check would be to find the headlight relay or control module. If the system uses a relay, pull it out and shake it. If anything inside rattles, replace the relay. Or buy another relay and plug that in to see if that restores power to the headlights.
On systems that use a module control module or daytime running lamps, about all you can do is eliminate other possibilities such as wiring faults, a bad relay or headlight switch first. If the module is getting power when the headlight switch is turned on, but the headlights fail to come on, the problem is likely a bad module. The module may be located in the front area of the engine compartment (common on Fords), under the dash or elsewhere in the front of the vehicle. You will probably need to refer to the vehicle service literature to find the module's location.
If the headlight relay or module do not receive voltage when the headlight switch is turned on, a bad switch is your problem. Switches get a lot of wear and tear, so it's not unusual for a switch to wear out after many years of service. Replacing a headlight switch can be difficult depending on whether is it located in the instrument panel or on the steering column.
If your headlights work on low beam, but you have no high beam, or they work on high beam but there is no low beam, the most likely cause is a bad dimmer switch. The dimmer switch is integrated into the steering column mounted headlight switch on most vehicles, so if the dimmer is not working, you will have to replace the entire switch.
DO NOT attempt to replace a steering column mounted headlight switch without first disconnecting the battery and waiting at least 20 minutes for the capacitors in the airbag circuit to discharge. The steering wheel will have to come off to replace the switch. Crossing up the wrong wires in the steering column could set off the air bag and cause personal injury.
If a headlight switch looks like it will be difficult to replace, don't try to do it yourself. Take your car to a dealer or repair shop and have them replace the switch for you.

Oct 16, 2012 | 2004 Chevrolet Impala

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My 2000 Toyota Corolla headlights will not turn on during the night, and stay on during the day


Your Corolla has daytime running lights (DRLs). A photocell determines whether it is day or night. Your DRLs turn on automatically in daytime without you operating the light control ("headlight") switch. Your DRLs are actually your headlights on low beam. At night, the photocell senses it is dark and disables the DRLs. When you set the light control ("headlight") switch to HEAD, the head relay closes and the headlights should turn on. Since they don't, I suggest opening the engine room junction block and checking the 40A MAIN fuse and the 10A LEFT HEAD (UPPER) and RIGHT HEAD (UPPER) fuses. In engine room relay block 5, check the 10A LH-LWR HEAD and RH-LWR HEAD fuses. Replace any blown fuses and the headlights should be working normally again

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. i will turn the


Thanks for choosing FixYa and welcome.

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There are several things involved here. The combination switch (headlight,dimmer, turn signal switch), The headlamp relay and the dimmer relay. It could be a bad switch or a stuck relay.

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Head lights stay on after engine is shut off.light switch in car is not on.tail lights aren't on just head lights


If you are turning the engine off before turning the headlights off then the headlights(only) will remain on for approximately 1-min. This feature allows you to use the headlights to get to where you want to, such as to your door with some light.
If your are turning your engine off before turning your headlights off, to turn them off - turn the headlights back on and then back off again. The headlights will turn off immediately.
However, if you are NOT turning off the engine before turning off the headlights, then this feature may be malfunctioning in the switch. To remedy this right away use the above procedure - turn back on then back off; until you can replace the malfunctioning switch.
Let me know if this helped, or if you have additional questions or information. Feel free to contact me at FixYa.com!
Again stated: these will normally turn off after 1-min.

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Probably something shorting out. This is something that probably isn't going to be easy to figure out. You need someone that can diagnose it in person

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