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24 votes
Accepted

Why one should not leave fingerprints on bulbs and plugs?

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 ...
motosubatsu's user avatar
  • 10.2k
21 votes

Are oils from the skin a problem with turn signal bulbs?

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 ...
JPhi1618's user avatar
  • 13.2k
17 votes
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Park/marker lamps won't turn off

I pulled almost every fuse from the fuse block under the dash without any success, but now that it is dark outside I was able to see something I missed when it was day: when I put everything back ...
Moshe Katz's user avatar
13 votes
Accepted

Why are VW tail light bulbs listed as 12W / 5W?

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 ...
HandyHowie's user avatar
  • 25.4k
12 votes

Smart and effective ways to light up a garage without relying on power outlets?

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. ...
Freiheit's user avatar
  • 350
11 votes

Smart and effective ways to light up a garage without relying on power outlets?

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/...
Edward's user avatar
  • 2,857
7 votes
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Is it Possible to Control Lights through OBD-II Port?

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 ...
Andrew's user avatar
  • 86
7 votes
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Headlight and dome light flickers

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 ...
Rory Alsop's user avatar
  • 18.6k
7 votes

Can stock headlight wiring deal with 110 W bulbs?

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 ...
sweber's user avatar
  • 7,057
7 votes

Why one should not leave fingerprints on bulbs and plugs?

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 ...
GdD's user avatar
  • 17.1k
6 votes

Smart and effective ways to light up a garage without relying on power outlets?

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....
John U's user avatar
  • 476
6 votes
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Can stock headlight wiring deal with 110 W bulbs?

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 ...
dlu's user avatar
  • 14.5k
5 votes

Vauxhall Zafira rear lights not working

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 ...
Steve Matthews's user avatar
5 votes
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What is the formula to determine a relay for aftermarket lights?

You need to know up front what the Amperage of the lights are in the first place and work from there. In the case of the light in the link is has a 72W draw on it. @ 12vdc, this calculates to 6Amps ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
5 votes
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What type of crimping pliers do I need for these connectors

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 ...
PICyPICyPICy's user avatar
5 votes

Car Bulbs: T10 W5W 501 what do numbers and letters actually mean?

T10 Refers to tubular glass, 10 mm diameter, according to this forum post. W5W The W5W defines the bulb "category", which is the standardized filament lamp design, as explained in ECE Regulation 37....
Zaid's user avatar
  • 39.2k
5 votes

What's this inside my gear shift?

I've seen this before. The bulb assembly usually fits into the gear indicator mechanism in a similar way that brake lights fit into brake light assemblies. That is, usually the bulb socket has a ...
Edward's user avatar
  • 2,857
5 votes
Accepted

Difference between orange and orange/silver indicator light

If the indicator lens is colourless, then you will need an orange bulb installed for the indicator to flash orange. If the indicator lens is orange, then it won’t matter whether you install an orange ...
HandyHowie's user avatar
  • 25.4k
4 votes
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2000 Honda Accord - Attempts to start cause lights to go out with no clicking and fails to start

This problem is usually indicative of a bad connection at the battery (or one of the battery cables). It almost behaves like a resettable fuse. When there is a connection, the lights work because the ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
4 votes
Accepted

What were those small light up oval emblems called on late 70s early 80s called?

I recall calling them opera lights. Maybe carriage lights as well. There were also opera windows.
mike65535's user avatar
  • 845
4 votes

What's the point of front turn signals?

So drivers travelling in the opposite direction know you have an intention to cross their lane. You only need to check youtube to see drivers who don’t see cars in other lanes or those who don’t use ...
Solar Mike's user avatar
  • 34.6k
4 votes

Using OBD to control add-on lights

What you're trying to do is overly complicated and you would need an actual auto electrician to implement. Without knowing the technical details of your particular vehicle, you won't get a straight ...
NetServOps's user avatar
3 votes
Accepted

Brake lights no longer work on a Volvo V70

My suggestion would be to chase the wiring directly rather than trying to identify all the parts of a system your mechanic did not even identify for you. If possible, find an electrical diagram for ...
cdunn's user avatar
  • 9,296
3 votes
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94 pontiac transport - direct shorting of blinker / brake light circuit - fuses blowing

Blowing a fuse is a pretty good indication of a short circuit. If you have a DMM (digital multi-meter) try some basic tests: With the fuse out, read between the prongs of the fuse socket and ground (...
dlu's user avatar
  • 14.5k
3 votes

Trailer socket problems

The first thing to check (and think about when using a meter) is where the ground is coming from: Is there a ground wire in the trailer wiring? Is there a good solid connection of the ground wire to ...
dlu's user avatar
  • 14.5k
3 votes

Smart and effective ways to light up a garage without relying on power outlets?

My take is slightly different, though related to what has been said. Obviously, LED lighting is the way to go. The reason for this is because the for the amount of light, it uses very little battery ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes
Accepted

Parking Light Switch Engages Head Lights

I suspect the contacts in the light switch are shorted. In a correctly working switch, In the off position you wouldn't have power on white/light blue or red/yellow. In the park lamp position it ...
Ben's user avatar
  • 10.7k
3 votes

Bulb confusion - 1995 Camaro front turn signal

You probably already know this, but the difference is the connector. The bulb itself is basically the same. Your best bet is to pull your current bulb and see how the connector is. This will give you ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes
Accepted

My dashboard lights are dim

Some of the newer cars automatically dim the instrument lighting when the ambient lighting changes. In other words, dim them at night so it is easier on the driver's eyes. Unsure if your car is ...
CharlieRB's user avatar
  • 9,015

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