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24

Why is this a thing? For bulbs it is - spark plugs don't care. The problem with getting fingerprints on bulbs (specifically halogen-type bulbs) is actually the grease that gets left behind - the bulb will get quite hot when lit and grease on a portion of the bulb will cause differences in the rate of heating on the bulb surface and thanks to the way ...


21

The reason headlight bulbs are so sensitive is their high wattage, halogen design and therefore high heat. Almost all other bulbs in the car are low-wattage incandescent which makes them easier to deal with. In your house you can screw in a normal light bulb by hand, but the thin halogen tubes that go in some lamps should also be handled with gloves. Same ...


13

If it is a 21W/5W bulb, then it has 2 filaments of different brightness. The 5W filament is for the side/tail light for night driving. The 21W filament is for bright illumination when you press the brake pedal. Image copied from ToolStation


11

A typical 1157 taillight bulb looks like this: The filaments have a common connected to the shell and the other end of each goes to each the two terminals on the bottom of the bulb. The bayonet pins are offset so the bulb can only be inserted one way. In the case of the 1157 bulb, the elements are 26.8W/8.3W, and have about a 10:1 difference in lumens (...


11

There are a number of ways to do this, but the two that come immediately to mind are battery-powered LED work lights. (A quick internet search will turn up many). Two varieties might be of use/interest to you. Some can be powered by the vehicle's battery which is convenient unless you're doing something like replacing a flat battery. Others have their ...


11

Battery operated flashlights or worklights which share batteries with your cordless tools would be a good option. These will allow you to work on the car even with a dead or disconnected battery. Choosing the right tool will give you either an area light or a focused light. Examples from one manufacturer: Other major makers such as DeWalt and Milwaukee ...


9

Each bulb have some sort of life time expectancy so if two lamps are installed at the same time and one fails after a long period of time you can deduce that the other can be close to failure as well so for security some people and manufacturers ($$$$) recommend replacing both at the same time. The thing is that there is no rule since a lot of factors come ...


8

They are being used as approach lights. When someone unlocks their car with the remote the car turns on lights around the car. I think the idea is to light up the ground around the car for you to better see where you are stepping and maybe for security. Some cars turn on the headlights, interior lights, parking lights etc. You point does make turning on the ...


8

To track down and troubleshoot electrical issues, you will almost certainly need a multimeter (also known as a Volt-Ohm meter) - digital ones are best, like the one illustrated below (from Wikipedia) You can get cheap ones, which are fine for most automotive stuff, or much more expensive ones with all sorts of clever features. The two most useful things ...


8

Tools Digital Multimiter Voltage, Resistance, continuity settings Automotive specific DMM's are typically the same device but may have a few extra features (Duty Cycle, RPM) CAUTION: Certain modes on the multimeter can cause damage to the device or your car if improperly hooked up. Never connect the DMM to a circuit in parallel when it is on the ampere ...


8

I can think of several reasons straight away: Cheap Easy to replace Have a very distinctive click that makes it obvious when they are on, and when a bulb has failed Are very well understood Anyone can fit one without needing to understand much about electronics


7

EDIT: I have heard that you do not need to remove the entire wing panelling. I certainly didn't on my 2003 Opel Agila. Just remove the screws from the front of the wing on the bottom of the car. Makes life easier. YOUR MILAGE MAY VARY ON THE CORSA! This is what Vauxhall has to say about the front fog lights. Firstly, we need to remove the inner paneling (...


7

From looking at your wiring diagram, you have clearly blown your main 15A fuse. This explains why nothing is working from the battery, but once the engine is running, your magneto is powering all the electrics. The disconnected wire must have shorted out and blown the fuse. In the tail light, the green wire is the 'earth' wire. The brown wire is the ...


7

The short answer is: no - not without the manufacturer's diagnostic tools. The long answer is: maybe. Modern cars have most (if not all) exterior and interior lights controlled by the body control module (BCM). Most (if not all) switches are connected to the BCM as well. This provides a lot of flexibility. A prime example is if you leave your headlights ...


7

This is very common, and not a problem. When you are starting your car, the load on the battery is huge compared to when the engine is running, as the starter motor is having to turn the crankshaft and push the pistons while the oil is cold and thick, and additionally compressing air into the cylinders, pumping fuel and causing a spark, while also driving ...


7

0.85 mm² copper wires have a resistance of about 0.02 ohm/m, and when a current of about 10 A is driven through this wire, it dissipates about 2 W/m. This isn't soo much and should not be a problem. But there are other weak points: Junctions and switches might not be designed for this current. And the bulb itself becomes really hot, since it ...


7

Fingerprints on spark plugs aren't a thing, the natural oils on your skin won't affect their operation. If, however, your fingers are covered in car grease or dirt when you handle the plugs then that can cause issues, either interfering with the electrode or the cable connection to the plug terminal. If you foul the plugs with dirt or grease then clean ...


6

My friend faced a similar issue on his '03 Nissan Maxima. In his case we discovered that the brake pedal switch was not making any contact with the pedal linkage. The switch relies on contact with the linkage to break the brake light circuit. If there is no contact with the switch (like when the brake pedal is pressed) the switch will complete the circuit ...


6

Possible culprits: A bad headlight relay Have the relay tested or replaced. It could be that the switch for the main circuit is intermittently stuck-closed. A closed-circuit in the light switch or relay getting grounded Eliminating a bad relay would leave you the possibility that the relay is being activated when it shouldn't through an intermittent ...


6

On the Expedition the hazard, lower brake lights, and turn signals all route through the multi-function switch. Gain access to the multi-function switch connector and back probe the light green wire while pressing the brakes. Does it have power? If it yes back probe the light green/orange and orange/light blue wires while pressing the brakes. Does it have ...


6

A "dead" car battery can still have more than enough juice to run things like LED lights, phone chargers, etc. - and lots of us have one kicking round the workshop we haven't got round to disposing of. Sticking one in your boot (sorry, trunk) to take with you is easy enough, and then charge it as far as possible when you get back to civilisation. If you're ...


6

TL;DR: You're on the edge, instead of pushing it, use the existing circuit to control a set of relays and supply the bulbs with a short run of larger wire. Use at least 3.3 mm² (12 AWG) wire, which you can fuse at 20 A. Use wire rated for "under hood" (high temperature) applications such as type GXL or TXL. You didn't ask, but I think it worth noting that ...


5

Turns out it was just the battery. Had it replaced today and dashboard lights were back to normal. Thanks for the help!


5

My mom's Prius HID bulb died (under warranty) so she took it in to get it replaced. The dealer replaced one of the bulbs and it was a completely different color than the original. I finally bought her two new bulbs from Amazon and replaced them for her because it was so bothersome. In a situation like that it is definitely worth it to replace both at the ...


5

Sort of. Older filaments in headlights can be noticeably duller. If you are OCD, it might benefit you. Typically when one bulb goes out, the others that were replaced at the same time are probably near their end of life. Or, perhaps not. I don't replace things that aren't broken. Otherwise, it's just more money for the parts store.


5

Bulbs - Swap the bulbs, like the comment suggested, with the ones on the other side. If works switch back and get replacement. Fuse - Swap the fuse with another in the fuse box with the same rating. If works switch back and get replacement. Connectors - Check for corrosion on connectors. Clean connectors with fine grade sand paper. Coat in something ...


5

I'm going to answer this in a general way because for someone to tell you what the wires mean, they would need to follow this procedure, or have access to detailed wiring diagrams for your car. You'll need a multimeter for this, and you'll have to take apart the brake light as if you were changing the bulbs so you have access to the bulb sockets. I'm ...


5

It sounds like you have a ground issue. When the running lights are on they are actually grounding through the brake lights. When you apply the brakes it cuts off the ground and the lights go out. The turn signals only look like their working. They are probably turning on and off when they should be getting brighter and dimmer. Double check the wiring on ...


5

Because stop / tail lights are so important, manufacturers will occasionally split the circuit so that they have a fuse for each side of the car. That way, if the fuse blows, you don't loose all lightning so I wouldn't simply assume that it isn't the fuse. With a bit of research, it points to fuse 7 being responsible for the right hand side tail light and ...


5

I believe crimping pliers for weather pack, metri-pack, or molex connectors will work. IWISS makes a tool just for those types of connectors. Alternatively, Paladin makes a crimping tool with die sets for those and other types of connectors.


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