Vehicle Wiring Tech Tips - Summit Racing Quick Flicks
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- เผยแพร่เมื่อ 2 ต.ค. 2024
- Wiring up your hotrod or race car shouldn't be a scary task. Al reviews some wiring tips like selecting the proper gauge wire and how to wire a single pole single throw electrical relay. You can find all of your vehicle wiring and electrical needs at Summit Racing Equipment.
www.summitracin...
This man has the information on circuit 30 & 87 reversed.
2 things I should mention about this stuff, as I work with it everyday!
1: higher strand count wire makes it much easier to bend the wire.2. Make sure you have a set of crimpers to get a good crimp around the terminal and wire.
+AMGV Media ,
Thank you for your input!
On the relay, your saying 87 goes to battery , when 30 goes to battery or fuses, Most diagrams show 30 for battery.
Good info , presented well. But lay off the steroids. That stuff is no good.
The suggestion for using a "star" washer was very helpful as an excellent ground can make or break a circuit(LOL) & nice/simple explanation of accessory relays too. I have worked in aviation(avionics specifically) for over 30 years. I spent 18 years building engine harnesses for our commercial aircraft fleets an never used solder when terminating wire ends(lugs, connector contacts or splices). We use only mechanical crimp tools as there is high vibration on an aircraft(more than any vehicle). I thought this might be of value to someone, crimp tools are calibrated and require specific settings per applications as overcrimping weaken the connection resulting in possible failure
Mike a great addition. I have been an electronics technician for over 49 years and like you think you need to be well aware of vibration. Off road vehicles and race vehicles need it badly. I also used to build harnesses for agricultural applications and as I said appreciate your addition.
Is soldering absolutely necessary in a land vehicle and where would I ev n solder
Mrs Richards: "I paid for a room with a view !"
Basil: (pointing to the lovely view) "That is Torquay, Madam."
Mrs Richards: "It's not good enough!"
Basil: "May I ask what you were expecting to see out of a Torquay hotel bedroom window? Sydney Opera House, perhaps? the Hanging Gardens of Babylon? Herds of wildebeest sweeping majestically past?..."
Mrs Richards: "Don't be silly! I expect to be able to see the sea!"
Basil: "You can see the sea, it's over there between the land and the sky."
Mrs Richards: "I'm not satisfied. But I shall stay. But I expect a reduction."
Basil: "Why?! Because Krakatoa's not erupting at the moment?"
Great video. It cleared up a few things for me. Three questions, however...
1. Can I daisy-chain a fused power source among several toggles to power their individual relays?
2. When adding a fuse/relay box to a vehicle, do I have to account for the total amp draw of everything attached to it to determine the size of wire to run from the battery, or is there a standard wire gauge for that?
3. What do you think of the practice of using over-rated wire for everything in a vehicle to eliminate the confusion of determining wire sizes?
the bell sound effect threw me off for a sec lol
come back to a old video for some advice. if I'm wanting to do a set up for a fuel pump that draws 1.6 amps average do i need a relay ? or can i run say my pump and fan off one relay ?
I have a couple of questions. I'm new to automotive wiring so I'm still learning this stuff...
1. I just bought the stuff to make a relay/fuse box for accessory LED lights. Is there a way to determine what guage wire to use from the battery to the fuse box? Like I know they are 40A relays and I have 5 of them? so does that mean I should use wiring rated for 40A or is there some other formula for determining this?
2. Is it neccessary to use relays for something like LED strips since they dont require as many amps?
3. How does all of this stuff work when wiring multiple devices to one switch or multiple switches to one device?
Sorry for the long comment. Any videos, articles, or advice you could give would be much appreciated. Thanks. Great video btw. Subbed.
Hi Hutson,
LED light bars are becoming very, very popular especially in the Jeep & Off-road market. One thing to keep in mind is the reason for their popularity, that is, the low amp draw for the amount of light provided. Reasonable additions of LED lights bars in general will not overload an already marginal OE charging system. Depending on the size of the bar, the amp draw may only be from 2 to 25 amps. That being said, your 40 amp relay is much larger than you need per each light bar, but will not hurt a thing! The more important thing to consider is the wire size between that relay and light. This is determined by the current moving through said wire and the distance it has to travel. There are wire gauge charts all over the net that you can obtain to help you determine the correct wire size. The purpose of the relay overall is to not have to run a higher current through a switch. Simply stated, a relay is nothing more than a low amperage circuit controlling a high amperage circuit!
30 is battery
Yup ... this wiring is wrong : it will work for Single Pull Single Throw, but if you use it against Single Pull Double Throw it wont work as your Normal Closed will not get any juice. People should use the standard of wiring the 30 to battery (via fuse).
It's important to know the difference between CCA wire and OFC. Always go OFC.
I'm a cheapo, I ran all my own wire, but what main components should have a relay, only thing right now I hv that's got one is my electric fan
A nice pack of ...ahh .. connectors 😑😂. That was golden. Cant say "butt" on the web I guess.
Hi, what will happen if I choose the wrong wire(thiker)?Let's say I need 16 gauge for my accessory but I will use 14 or 12 gauge.
Mirik Man
No big problem just causes a bulkier harness. A little extra will never hurt your performance. This extra can make up for excessive current draw and voltage drop which Will cause poor performance. Great question just read all the comments, there are many experienced helpers out there to give you a hand. Every comment can be filled with the information you need. Good luck my friend.
Your wallet will be lighter than it should be. Thicker wire costs more.
why many cars mix switches when you don't have solid ground
like am indicating left and at the same time current flow to packing lights or something else light
this happens when some of cars have less than 60 percent contact between negative terminal of the battery and engine or car body
I need to become a wiring harness designer. I dont know where to start..plz guide me
A good place to start would be a electronics class at a good trade school.
Great video and a great education. Time to buy some new tools for my toolbox.
@Summit Racing can you please remake this video and show the correct wiring? Pin 30 is to be connected to the 12v Battery source (via Fuse). Even though the diagram shows still works for Single Pull Single Throw relays, it will not work for Single Pull Double Throw relays (the normal closed 87a will never get any power) ... not to mention that you are violating the ISO standard of wiring pin 30 correctly (think other people needing to maintain your wiring)
Dirk B....I just read your comment after seeing this video......you are 100 percent correct and I was scrolling to see how many people caught this fundamental error. Sad to see Summit put a video with such an error out there!
This guy's arms are too loud. I can't hear what he's saying
I'm struggling to figure out what I should relay. Is there a chart or way of figuring it out? Like I know lights, fan, fuel pump, but what else?
You should always relay ... basically you never want any current to go throw your switch interface.
If budget is no issue, then just to be on the safer side is it simpler to just go with let's say 12 or 14 gauge wire instead of 16 gauge (calculated using charts)?
Saurabh Makkar yes, although a bigger gauge wire might have more resistance than a smaller gauge, but it doesn’t hurt too much
Are your crimpers #900401 the same as painless performance #70900?
am i able to wire a distibutor through a relay? and what amp relay and fuse should i use?
how can i wire a 67 mustang steering column when wires dont match
do you know what gage wire I need to use to rewire my 93 2.3l mustang? I used 16 gage but it is like double the size of my fuel injector connection
+Maurice Terry if you have the old wire, it should be on there.
+Maurice Terry,
16 gage wire is good up to a 10 amp current flow and while your injectors won’t draw that much, a little overkill never hurts!
I'm getting from you that 87 has the battery in and 30 is the acc. power... but on the internet diagrams I have looked up its right the opposite?? great.. how can I no for sure which is correct for mine?
Matt Sisum the Internet is correct this diagram is wrong, 85 & 86 are the earth and trigger for the solenoid, 30 is battery power in and 87 is power out to whatever you're running.
Yup this wiring diagram is wrong: 30 is to be connected to battery (via Fuse) ... the setup here will work for Single Pull Single Throw, but it will not work for Single Pull Double Throw ... The ISO standard clearly defines 30 to be the connection to 12V source.
oh its the fuel injection harness
If you had included the metric system aswell, this tip would help so many more people
I have some relays to wire my cooling fans. The instructions indicate terminal 87 goes to the fan and terminal 30 from battery. Your video has these reversed. Does this matter or should I follow the manufacturer's instructions?
+rileycalvin69,
Different diagrams in the industry have these two terminals swapped, but only because it works fine. They simply make a connection from the power source (usually battery direct) to the component be supplied. Do be careful though to not swap the other terminals.
Good stuff.
Thank you so much
Thank you for watching, Hassan!
I wouldn't recommend soldering automotive electrical connections because of heat related issues melting the solder or creating a poor high resistance connection