I used superbrightleds.com as my supplier for my inst. lights in my 89 Trooper. The speedometer and tach take the 194 bulbs and there are 2 in each. Don't make the same mistake I made. I got the .99 cent bulbs. They are not as bright as I would have liked. Get the upgraded ones with more leds. For the oil pressure, fuel level and water temp., they take a 74 bulb and on these I used the upgraded ones. They were 1.95 each. Had a little trouble installing them. When I put the bulb in the holder it was a tight fit, and it expanded the holder where it wouldn't fit it the hole in the back of the gauge. I used a drill to enlarge the hole ( careful) not to big, and they went right in. Overall, happy with them and they match (red) my radio. As a side note, they ship fast and there shipping is very reasonable. Also as another side note, the speedometer will be hard to pull out far enough to replace the bulbs. I got enough slack in the cable by freeing up all the clamps in the engine compartment and pushing the cable through the firewall till I could access the bulbs.
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1990 Amigo, 2.3 5 speed (sold)
1991 Pick up (long gone)
2000 Amigo, 2.2 5 speed(sold)
1985 Trooper 1.9 4 speed (sent back to KS)
1989 Trooper RS 2.6 5 spd. Red