Hey guys, I don't have a multi meter to check so I was wondering if someone could tell me what voltages go
to the climate control bulbs, rear Def bulbs, harzard switch bulb and cruise control bulbs, also ash tray,

I assume they are all 12v but since they are so small I thought Honda might have resistors in the car factory to lower the voltage on the small bulbs.

I have some 3.3v leds to replace them with and need to find out what size resistors to use to keep the bulbs in the 15-20ma range. Thanks


94 Teg if it matters, doubt it will

 

Voltage is 12.5V -14.5V depending on alt. output and if engine is running or not.

You will not be able to dim the LEDs as any ground, [dimming is done by limiting the ground to the bulb] will turn on the LED. 94

 

So the 3mm and 4mm bulbs still run on the 12v? No factory resistors?

What size resistor is needed to drop the current to 3.3? Online calc said 470ohms but that sounds awful high

 

Wait, current or voltage?

To drop voltage, you'll need to know the current draw of the components you're intending to use. Considering that the input voltage is variable, you'd probably be best off finding a voltage regulator with an input range capable of covering the expected system.

Since those aren't all that cheap, just go get some 12VDC LEDs.

 

You can get LED bulbs w/resistors built in that are plug and play. 94