22
votes
Accepted
40amp protection on 25amp rated wiring?
The maximum rating of 25A will be for continuous use. The 40A fuse is there to blow very quickly in a fault condition.
If you look at this page https://en.wikipedia.org/wiki/American_wire_gauge 2mm² ...
- 25.5k
21
votes
Accepted
Can I connect wires by just twisting them together and insulating with tape?
While the twist/tape method will make the connections and work, I tend to leave this for the quick fix. Over time, with the everyday vibrations occurring, this method tends to allow for continuity ...
- 162k
16
votes
Can I connect wires by just twisting them together and insulating with tape?
@Pᴀᴜʟsᴛᴇʀ2's answer is excellent. But, I'd like to add: rather than just twist & tape, there's something called a "lineman's splice," or "Western Union splice" which provides a great electrical ...
- 3,159
9
votes
Accepted
How to remove a stuck (maybe melted) connector from the blower motor resistor
The connector will need to be replaced. It looks to be fused together. The metal connector terminals were the cause of the original problem. The usual problem is that the connector makes poor contact ...
- 11.7k
8
votes
Wiring extra truck battery to power winch
The method suggested by Paulster2 will certainly work.
Another way to do it at lower cost is to use a 12 volt, 120 amp continuous duty relay.
Make a permanent connection with heavy cable from the ...
- 8,518
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 ...
- 7,057
7
votes
Accepted
Car alarm install. Should I interrupt starter or ignition?
The average aftermarket car alarm uses cheap components and is not designed for high reliability and long life. This is not to criticize the particular model that you plan to install, but I'm speaking ...
- 8,518
7
votes
Does the hood pin-switch here constitute an electrical risk?
TL DR: It shouldn't be a concern whatsoever.
If the switch is like any other of this type, the idea is for the hood to come down and press down on it, and thus disconnecting the grounding source. In ...
- 162k
7
votes
Wiring extra truck battery to power winch
I think the easiest way to accomplish this is the get a 12vdc to 12vdc charger to use to charge the battery, then keep the wiring to the winch as direct wiring without connecting into the truck's ...
- 162k
6
votes
Accepted
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 ...
- 14.5k
6
votes
How to remove a stuck (maybe melted) connector from the blower motor resistor
Dont you have to remove the connector with the green/black wire also? In your photo it looks like the connectors are melted together. You can get a knife and try to seperate them first.
The blue ...
- 1,198
5
votes
What's wrong with using domestic flex cable for automotive purposes?
Automotive cables are normed (ISO 6722 ?).
The insulation of automotive cables offer a superior resistance to heat, cold, chemicals and vibration.
A common FLYR-cable should guarantee its insulation ...
- 8,513
5
votes
What is this covering used on the wires (blue and yellow). I found it on my KTM 390 Wiring Harness
The black material sheathing the blue and yellow wires is commonly called wire loom. It serves to organize the wires and protect them from damage.
There are three main types that I am familiar with:
...
- 14.5k
5
votes
Accepted
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 ...
- 218
5
votes
Accepted
How to wire a glow plug?
A glow plug is essentially an intentional short circuit that heats up a wire and ignites whatever fuel is in or connected to the glow plug.
Polarity rarely matters in this. But typically, the ...
- 603
5
votes
40amp protection on 25amp rated wiring?
I would suggest that you should find the source of the fault - probably in the wiring as you suggest as it could get worse and cause a fire (not the best thing in dense traffic with no place to go).
...
- 34.7k
5
votes
Starter spins but doesn't engage flywheel
Its probably not the fuseable link; more likely is that the starter motor needs to be shimmed. The starter motor has a small gear ( the pinion gear) which sticks out on a shaft to engage the ...
- 261
5
votes
Accepted
What are these unused dash plugs on my E-350 (cutaway / bus)?
I found an image of a 2013 E350 dash online, which shows what these might be used for ...
Red Circle:
At least part of these controls appear to be for aux audio input. The two top parts appear to be ...
- 162k
5
votes
Accepted
Quick-release for battery terminal loops (D18S/T3)
Consult your favorite search engine for 12V Quick Connect to find a multitude of possible solutions such as this one:
Photo credit
- 8,518
4
votes
Accepted
Wire Lights '72 CB750
I think you have a problem
The photo's of your harness and various components are not OEM. The wires are too new looking, as well, your turn indicator relay is definitely aftermarket.
Here is ...
- 33k
4
votes
Remove/Replace engine wiring harness on '02 VW Jetta TDI
I'm biased based on my experience, but perhaps it might be helpful. I spent time in the Army troubleshooting (and teaching mechanics to troubleshoot) vehicle electrical systems. After that job I ...
- 6,569
4
votes
Accepted
Is it appropriate/safe to butt splice old PVC to thin wall?
Your plan sounds fine to me, the butt splice connector is a good choice and the cable is slightly thicker than the one you are replacing, just make sure that the wire is secured so that there's no ...
- 17.7k
4
votes
Just bought a 2001 Jetta, the radio wiring is super screwed up... no clue what to do
Had to do this for customers before : start by removing all the non-original stuff.
Then with the key off use a meter and find the permanent live, next key to aux and find switched live, the ground ...
- 34.7k
4
votes
When to use chassis and when to wire to battery neutral?
750 watts is slightly less than 63 amperes. So, the question is whether the car
chassis can supply 63 amperes.
Let's pick a 4 meters long steel object. If it weighs 500 kg (I assume a car
chassis ...
- 15.3k
4
votes
Accepted
Missing fuses - is it OK?
The fuse box is designed for all vehicles and positions only used as needed for each vehicle.
First check if those empty fuse slots have terminals in them, without terminals adding fuses does nothing....
- 34.7k
4
votes
Accepted
How do I remove this wire?
Plastic or nylon housings like this usually contain one-half (either male or female) of a push-on spade connector. Here's a female one, with no wire:
The male connector part slides into the female ...
- 3,665
4
votes
Car alarm install. Should I interrupt starter or ignition?
Most modern immobilizer systems cut off
Ignition, Crank and fuel.
You could easily use it to cut off the start signal and something like the ASD relay control. That should disable both the fuel & ...
- 3,790
3
votes
4-way car connector to 7-way trailer connector
Have you actually tried hooking it up as you suggested and ignoring pin 6 (circuit 54) on the trailer connector? I think it is likely that the trailer is wired with a single filament for the turn ...
- 14.5k
3
votes
Rewiring Liebherr crane with magnet
Assuming that this is for a material handling magnet on a crane of some sort, I have a few observations based on working on locomotive cranes with large magnets used for handling scrap metal:
600 V ...
- 14.5k
Only top scored, non community-wiki answers of a minimum length are eligible