Hello I have a 2006 Ford ranger 3.0 4x2 I just decided to put led lights in my gauge cluster to red to match my truck well after putting the gauge cluster in and left out everything else my rpm and speedo do not work and they worked fine before so I’m guessing I’m missing something I figured it was going to be a simple swap and done but is the led lights interfering with the gauges?

 

LEDs are polarity-sensitive. The original incandescents aren't. So take the ones that aren't working out, rotate them 180°, and reinstall them.

 

so the ones by the rpm gauge and speedo rotate the whole bulb assembly? 180 degrees?

 

Just the bulb.

 

thank you I will give it a try!

 

how should I calibrate the rpm gauge? Because I did mess with the needle

 

I have no idea how that would be done.

 

no worries thank you I’m going to try and rotate the bulbs tomorrow at some point and let you know

 

i turned the bulbs around the rpm and Speedo 180 and I got my tach working but still no speedo