Help with gauge cluster lights

[Truck82]

Half of my lights behind the gauges on the dash don’t turn on. So I got some new bulbs, plugged ‘em in and… still nothing in the ones that didn’t work before.
I know absolutely nothing about electrical and need some help here. Are the sockets that the bulb plugs into replaceable?
Thanks all in advance!

 

[mtbadbob]

Most of the time the printed circuit board is wore a bit where the bulb sockets twist onto the gauge panel. Sometimes, if you have a burnt spot in the circuit board, it'll cut off power to the bulbs beyond it. I did have a weird, rare instance once where I kept replacing the bulbs that wouldn't light up, but it turned out to be that the last working bulb was the problem as it wouldn't pass the voltage to the bulb next in the circuit. Try replacing the last working one in that area.

 

[Dmack]

The twist-in bulb holders are replaceable. You can also take a pencil eraser and gently clean the area they contact the printed circuit. Also, if you are trying to replace them with led bulbs, be careful. They don't always work and don't mix well with standard bulbs.

 

[Truck82]

The twist-in bulb holders are replaceable. You can also take a pencil eraser and gently clean the area they contact the printed circuit. Also, if you are trying to replace them with led bulbs, be careful. They don't always work and don't mix well with standard bulbs.

Good to know as I am swapping over to LED. I didn’t know that the connection was where it touches the board. I have been trying to clean the inside of the bulb holder.

 

[GTX63]

I have replaced many bulbs in old squarebodies. I also upgrade to LEDS for the difference in brightness. I have found through trial and error to replace the printed circuit panel and any sockets that even look remotely worn or corroded. It just isn't worth the hassle to keep popping the panel apart and risk losing screws, overtightening and cracking the bezel, etc. Besides the lighting, old circuit boards can affect gauge readings, signal lamps, etc. The printed circuits are about $70 online and well worth it.

 

[Jgonick]

if you are trying to replace them with led bulbs, be careful

LEDs (light emitting diodes) Diodes only allow current to go one direction. Using them in dash lights generally isn't an issue. If they don't light up you have them in backwards. However - LEDs make it a pain trying to diagnose what is wrong (because you don't know if the bulb is in backwards or if it is something else- It just adds one more possible problem to the equation). I would suggest using regular bulbs until you figure out what is wrong.

 

[Ron Sebastian]

Thought I would chime in...you also lose the dimming with LED's unless they are the special LED's that allow dimming.