mustang interior led

Printed From: the12volt.com
Forum Name: Lights, Neon, LEDs, HIDs
Forum Discription: Under Car Lighting, Strobe Lights, Fog Lights, Headlights, HIDs, DRL, Tail Lights, Brake Lights, Dashboard Lights, WigWag, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=119977
Printed Date: July 07, 2025 at 10:41 PM

Topic: mustang interior led

Posted By: wicked xtreme
Subject: mustang interior led
Date Posted: February 08, 2010 at 12:17 PM

Question for all you LED guru's.

I have an 07 mustang. I wanted to change the map lights to blue LED's. Not the lamps, but add through hole LED's.

When I first installed them they would not work, I then moved the resistor from the positive side to the negative, that made them work just fine.

Since doing this My car electronics are a little screwy. I removed all I did and the same thing.

Why would the led work with the resistor on the anode (-) and not the cathode(+)?

Thanks, this has been bothering me for 3 days now.

Replies:

Posted By: oldspark
Date Posted: February 08, 2010 at 4:50 PM

There is no significant reason. It is most likely a bad connection - internal break etc.

I presume you are using a single LED with (say) a 470 - 560 Ohm resistor?
And that it is connected across the bulb?

I'd try with a new LED & Resistor.

Posted By: wicked xtreme
Date Posted: February 14, 2010 at 12:16 AM

Sorry for the lapse in response.

They were not "across" the lamp. I used the hot side of the lamp and a common ground that all of the lamps went to.

Thanks, I will keep you posted on my finds.

Posted By: oldspark
Date Posted: February 14, 2010 at 6:16 PM

Electrically speaking, that is "across" the lamps - ie, in parallel with them. (Unless I still misunderstand.)

But the a single LED across ~12V without a resistor should blow....?!