Speedometer lights not working, any ideas?

Hello I am new here and wondering if anyone has any advice on why my speedometer back lights aren't working. All other lights on the instrument cluster are working perfectly. Sometimes the speedometer lights will flicker on for a second which makes me think it has something to do with a loose wire but I can't find which wire that might be.

 

did you pull the gauge and check bulbs/wiring?

 

Yes. I actually replaced the leds a while ago to switch to a blue backlight. The lights turn on properly if I actually twist the circuit board lightly.

 

something is loosing contact then...maybe a solder joint
may need to get a magnifying glass to locate it

 

Sounds like a cracked solder joint on the board itself, there's only 1 input for the backlighting so if the rest work fine it has to be a problem on the board.

 

Try this thread for the answers you seek: https://www.tacomaworld.com/threads/intermittent-speedometer.685356/

 

Broken trace on the board. If you locate it you can bypass the break with a small wire and solder.