Question about 1994 Toyota Pickup

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I have no power to my headlights,I've checked fuses and relay they are okay.I don't think there is no power going to the switch.Do you have a wiring diagram for the lights? Thanks

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That is a bead headlight switch. You would have to replace the it with a new one. Actually you have to get the whole switch assembly where the head the switch to the headlight is integrated in.

Posted on May 24, 2011

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1 Answer

Fuse seems okay but no head light but there is bright and park light


could be blown headlight on low beam filaments in globe.
other possible causes - headlight relay
check if there is voltage at the relay coil being switched thru. if not the headlight switch could be faulty. get a piece of insulated wire - strip the ends and bypass the relay by passing the +ve voltage wire to the headlight side. this replicates the relay function. thus testing if switch is faulty in providing power to relay coil.

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No lights 1986 nissan


Check fuses, check light switch and relays. This sounds like a no power issue so check fuses first. The light switch turns on or activatves relays which the power or voltabe to the lights .

May 27, 2014 | 1986 Nissan King Cab

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My 96 Toyota Camrys windows don't go down or the


You need to see a wiring diagram to see how the ignition switch allows or sends power to that 30 amp fuse. The switch may turn on a relay (maybe the ignition relay) that sends power to the fuse panel. Or the run wire out of the switch may itself turn power on at the fuses. You may have a loose connection behind the fuse panel.
Get a test light, pull the fuse, and check for power at the fuse terminals, with key on. One terminal for the fuse should have power. If not, power is lost between the ignition switch and that fuse. If it does have power, and windows still don't work, check the wire from fuse panel to the master switch-loose or poor connections, maybe a partially broken wire. If it looks good, check the ground wire for the windows. The ground wire originates at the master switch and will go back into the cabin to a nearby ground, possibly behind the left kick panel. If still no help, someone may need a volt- ohmmeter to start checking continuity of wires, voltage drops, etc.

Jun 18, 2013 | Cars & Trucks

1 Answer

2001 chevy impala overhead light wont turn off


see this steps and fix it use the VOM or DVOM. God bless you
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

1 Answer

How can i test a headlight relay?


I don't have a diagram of the circuit so I can't give you wire colors.
The relay should have a diagram on the side of it showing the pins.
One pin is power to the relay magnet, the other is ground for the magnet. The magnet closes a switch which is power for the headlights and the wire to the headlight fuses.
You would jumper the power in and out for the headlights to bypass the relay - or use a test light to see if you are getting the right voltage on each pin. If you ground the relay with a test light the relay magnet should close the switch.

Sep 27, 2012 | 1995 Toyota Tacoma

1 Answer

Headlight short


Don't think you understand what a short is

You need vehicle specific factory wiring
diagrams & some electrical theory to find
the issue

Helm.Com to buy manuals for GM Veh

Jul 17, 2012 | 2008 Chevrolet Aveo5

1 Answer

High Beam headlights don't work, Taillights don't work, Brake lights don't work, Cruise control doesn't work.


Hi Harlan.

I see that you mentioned a 1999 Dodge Grand Caravan in your other question. I assume this question is about the same vehicle.

The checkup will start from the fuse and relay in the power distribution center. A way to test the relays is swapping two relays of the same kind to check if that makes any difference.
If relay and fuse are OK check the wiring to power distribution center, check the dimmer switch and the connection to BCM (the module under the dash).

I have uploaded relay map and wiring diagram at this link. Please click on the link. If necessary click on the picture again to enlarge.

Regards.

Nov 22, 2011 | Cars & Trucks

1 Answer

High beams work low beams do not


you don`t say if you have checked the fuses for the headlights.if the fuses are okay and you know that the low beam filaments are working.you may have to feed power and ground directly to the proper headlight prongs from the battery to make sure the bulbs are good.then it could be a relay for the low beams or a switch for the headlights.you don`t say if you have daytime running lights on this car as there is a module for this system that may be the problem for the now low beams.

Mar 28, 2011 | 2006 Chrysler PT Cruiser

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