Simple LED wiring help

[guitarguy89]

Alright so,
I've done a few small wiring projects before but I can't really figure out what's going on.
I just bought my girlfriends son one of those 12V ride on cars for kids. It works great and he loves it. But I got the wise idea to ad lights to it. So I drilled out the backs of the headlights and side mirrors, as well as the brake light in the spoiler. Altogether I'm running 6 5mm red led's and 2 jumbo white ones. (I believe they are 10mm) so when I hook up the power to the 12v battery, nothing.
Do I just need more power?
I have all of the positives wired together and all the negatives wired together

 

[Gryd3]

Do I just need more power?

This is not Home Improvement. More Power is not your answer.

LEDs are 'current' driven devices, and when supplied directly with a voltage that is higher than their own voltage-drop will cause a excessive current to be sent through the LEDs.

One of two things happened. Either they are all hooked up backwards, then you can cross your fingers and hope they are still good.
Or, you hooked up them with the correct polarity and killed them all.

What you need to do is plan how you will wire these things. You will need resistors, or an LED driver.

Take a look at this and see if you have any questions : https://www.electronicspoint.com/resources/got-a-question-about-driving-leds.5/

Also take a look here : http://led.linear1.org/led.wiz
Do this wizard twice. Once for the red, and again for the two white.
Type in 13V for the source, then type in the forward voltage drop, and current for the color of LED you are figuring out.
I could give you examples, but you should have a data sheet or details based on the LEDs you have.