No horn and wipers when beam lights are turned on

car starts immidiately, lights are ok signal l, break lights, head lights, but there is no horn and wipers when headlights are turned on..
Experienced mechanics share their insights in answering this question :
It sounds like you have a short in your electrical system. I would recommend starting with an [electrical systems inspection]https://www.yourmechanic.com/services/electric-problems-inspection) to determine where the cause of the issue is. There are likely some damaged wires somewhere that are causing this issue to occur. It is very likely that this short is occuring in the steering column so be sure to have that area checked. Consider YourMechanic for your electrical system inspection as a certified mechanic can come to your home or office to determine the cause of your electrical issue.

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A ballast resistor will balance the power to the headlights ensuring that both the lights have equal amount of voltage. As for the wipers coming on when the headlights are on, there is a short in the electrical wiring or connection on the multi-function switch that operates the high beams and the wipers.
You may be dealing with bad bulbs, a bad flasher relay, a faulty turn signal switch, or a bad wire or connector between the flasher unit and the turn signal switch. First, check the bulbs to see if they are still in good shape: No darkened areas or damaged filaments.
There are a number of reasons why windscreen wipers stop working and these include: torn wipers, broken controls, a blown fuse, faults with the motor, damaged arms, snow or ice covering, loose pivot nuts and a break in the wires.
Headlight wiper systems are only seen on a very small portion of vehicles on the road today, which is why most people aren`t aware of how they operate. Their purpose is simply to provide a clean headlight lens for the best view-ability of the road ahead.
Autowipers uses a rain sensor located in the area around the interior mirror. The rain sensor monitors the amount of moisture on the windshield and automatically turns the wipers on.
The first sign of trouble is when the switch begins to behave in a fashion that is abnormal in any way. For example, if there`s an audible crackle, snap, or popping sound when you flip the lever, then it`s pretty clear that your switch is defective and it`s time to replace it.
Like all of the lights on and in a vehicle, turn signals rely on a fuse.
The wiper relay is unique in that it`s found inside the wiper control handle which often has selector switches giving drivers multiple settings for their windshields. Over a period of time, this relay can be damaged – which will impact the operation of the windshield wiper system and in some cases, render it useless.
Humming noise when the wipers are on

In some instances, you may notice that there is a strange humming noise when trying to operate the wipers on the car. This is usually caused by the wiper motor not getting the power that it needs due to a bad relay.

Headlights must also be in use whenever windshield wipers are in use. Headlights are also necessary when driving through fog, smoke, mist, or other weather conditions that reduce visibility.
Most rain-sensing wipers use a sensor that`s mounted behind the windshield. It sends out a beam of infrared light that, when water droplets are on the windshield, is reflected back at different angles.
Windshield wipers are powered by a small electric motor, usually mounted on the firewall or under the cowl (the area under the windshield`s base). The motor activates linkage that moves the wiper arms back and forth. On vehicles with a rear window wiper, a separate motor powers the one in the rear.
It`s not always easy to tie a tripped breaker or fuse burnout to a problem with a single switch. The issue isn`t always with the breaker or fuse. A bad light switch can be one cause.
The relay is the flasher`s beating heart. The relay is the electromechanical component that allows the operator to make switch selections. Typically, a switch is activated, which energizes the relay`s electromagnet. This electromagnet closes connections, supplying electricity to the flasher and lights circuit.
Yes! Hazard lights can drain the battery of your car. Any electrical device in your vehicle can become a drain if its left on such as headlights, radios, and even door pins. These things can be problematic if they are left operating when your vehicle`s motor is off.
A turn signal relay (also known as a flasher relay) is the electronic device that controls your car`s turn signal lights. The clicking sound when you activate your turn signals usually comes from the turn signal relay.
The indicator flasher relay is a traditional car component and has been in use since decades, precisely regulating the turn indicator`s signalling system. The typical flashing enhances the signalling effect of the yellow lights on both sides of the car.
The reason most mechanical flashers won`t work with LEDs is that they require very little current flow, which is not enough to heat the internal strip and open the circuit. There are several types of electronic flashers available, however, not all of them are for LED applications.
Neither turn signal light is working.

If both lights are not working, this is likely a sign of a blow fuse or a dysfunctional flasher. This could also be due to a corroded socket or damaged bulbs, which are a slightly more complicated issue.

The only tool required to check a relay is a multimeter. With the relay removed from the fuse box, the multimeter set to measure DC voltage and the switch in the cab activated, first check to see if there are 12 volts at the 85 position in the fuse box where the relay plugs in (or wherever the relay is located).
The windshield wiper system is made up of only a few components, and significant problems can occur when only one of these elements is damaged. The power to the system is regulated by a fuse that is wired directly to the wiper motor and the switch.
Disconnect negative battery terminal before replacing wiper motor. Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pre-tensioner activation.
The relay functions as a switch and energizes circuits as needed. In the case of your windshield wipers, it controls low, high, and intermittent speeds by energizing a particular circuit at a given moment depending on what speed you have your wiper switch set to.
As we mention in this article, though, it`s important that the working wiper adequately clears the windscreen so that you can see the road ahead of you. If this isn`t the case, then driving your vehicle is illegal and can be classed as `careless driving`.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Okay so when I turn my lights on at night my brake lights do not work, when I don’t have my lights on they work fine.
ANSWER : Hi there. Based on your inquiry, it’s highly probable that you have a damaged light switch or some electrical fault inside the turn signal relay. However, it’s also possible that the brake switch above the brake pedal could also be the source of your problem. Due to the fact that multiple electrical components might be causing this issue, it’s a smart idea to first have a professional mobile mechanic complete a brake lights are not working inspection, so they can determine what’s causing all of these issues and recommend the right repairs.

on a 1970 Lincoln mark iii Interior lights wont turn on and warning lights are very dim and doorlock button makes buzzer go on
ANSWER : Hi there. Although the electrical systems on older vehicles tend to be much simpler in design, in many cases, issues like you’ve described can be very tricky to trace. It could possibly be something as simple as an expose wire creating an electrical short or a faulty relay that is not completing an electrical circuit. I wish we can help you further, but the best advice I can offer is to have one of our mobile mechanics come to your location and complete an electrical problems inspection.

Battery light goes on when I start car then turns off, if I rev engine light comes back until rpms go down. Abs goes comes on/off
ANSWER : Batteries can die due to faults in the charging system so ideally a suspected "faulty" battery should be load tested before a decision is made to condemn it. The only exception to this rule is if the battery is already clearly "old" (greater than 5 years) but even then once you put a new battery in, as a replacement for a "dead" battery, you have to comprehensively check out the charging system. Diagnostic Trouble Code P0460 will result in disruption of the dashboard fuel gauge’s ability to accurately report your tank’s fuel levels. The fuel gauge readings may be erratic, or read somewhere off scale. Vehicles equipped with a low fuel warning light feature may also suffer from erratic low fuel warnings in the event of a code P0460. Unless the P0460 code has been reported alongside other trouble code, all of the vehicle’s essential systems should otherwise function normally. I would recommend that you request a check engine light diagnostic to first resolve the fault causing the P0460 code to set. The check gas cap light warning light could be due a faulty gas cap and/or small leaks in the EVAP system.

No dash lights, back right tail light is out, no parking lights. Brake lights work though as does head lights.
ANSWER : Hi there. In many cases, when you have electrical problems like you’re describing, it’s caused by multiple electrical component failure. It’s likely that a few electrical relays are not working; especially if you have systems that utilize the same components (such as your brake light and tail lights). I would recommend having a professional mobile mechanic come to your location to complete an electrical problems inspection first, so they can pinpoint what is damaged and recommend the right repairs.

Dome light turns on and off by itself while vehicle is turned off.
ANSWER : Hi there. Check the courtesy light switches on the doors to the vehicle. It seems that one or more switch may have a bad ground or a bad contact in the switch causing the courtesy light to come on while the engine is off and the key is out of the ignition with the doors shut. If you need further assistance with your courtesy light, then seek out a professional, such as one from Your Mechanic, to help you.

No horn and wipers when beam lights are turned on
ANSWER : It sounds like you have a short in your electrical system. I would recommend starting with an [electrical systems inspection]https://www.yourmechanic.com/services/electric-problems-inspection) to determine where the cause of the issue is. There are likely some damaged wires somewhere that are causing this issue to occur. It is very likely that this short is occuring in the steering column so be sure to have that area checked. Consider YourMechanic for your electrical system inspection as a certified mechanic can come to your home or office to determine the cause of your electrical issue.

Car turns off
ANSWER : The problem sounds like your alternator has stopped charging the car. This will cause the car to have weak electronics like what you are experiencing. Have the charging system double checked, and if verified as the fault, replace the bad alternator.

Economy Mode light won’t turn off on 1997 Mercedes-Benz S420
ANSWER : Thanks for writing in about your 1997 Mercedes-Benz S420. This is a warning from the system telling you that there is a problem that must be serviced. You should have the light looked at by a professional so they can inspect the system for the fault causing the climate control to function improperly. In some cases, a low refrigerant charge from a leak can cause this problem.