recently I found that 94 red needles would not work in my 92 dash. I tested the needles with a 9V battery and they worked fine. Someone said just get new needles. Well, you need the right polarity needles. I took a DMM and tested the polarity of the working needles and then compared to the 92 pins, backwards! OK, so all I have to do is reverse the polarity in the needle. Easy? Yes...remove the needles and use a small dremel to grind off the 3 dabs of melted plastic that holds the white LED assembly into the black needle body. Open the brass/chrome crimps outboard of the shaft with a small screwdriver. Slide the contacts off and cut off the crimped end. youll be left with the socket part that runs next to the shaft. Glue this back into position with CA (super glue) and then solder a small wire from one socket piece across the back to the opposite LED contact that was under the crimp. Do both sides like this. I used a piece of 32g wire from a USB cable. When complete, test with a 9V battery across the socket pieces. Now you have changed the polarity of the needles and can push them back onto shafts gently. My speedo needle took about a second to light up after I pushed it on...dont know why but it lights up fine when I turn ignition on. I lost voltage on the temp pins, traced one side to K2 screw on back of dash pod. a job for another day.

grind out 3 plastic welds

pry open the contacts and remove

remove and isolate each contact by cutting below spring gluing back onto shaft.

solder wires to contacts

cross wires around back and solder to glued on socket

corrected polarity 94 needles glow in a 92 dash.

 

Great job, pishta! I would love some of those red needles in my '92, however I feel it would be sacrilege to disassemble my 100% working 50k mile needles. Perhaps in 10 years!