I've tried searching but found nothing except LED swaps.

My 4x4 light doesn't work (does not light with key on, engine off ; in 4hi or 4lo even though I'm obviously in 4wd)

Are these bulbs changeable or they're integrated in the cluster? If so, what are they?

 

It depends on the year of your truck. Earlier versions did have a seprate bulb for them. It was a T5 base, bulb size 74. Later versions had the LED directly soldered onto the board.

 

I have a 98 F150 4.2l

 

Yeah, you have the separate bulb. T5 base, bulb size 74.

 

Thanks a lot! I'll change them all if I'm going to give myself the hassle of dismantling the cluster

 

No prob. 1998 uses 4 T10 base bulbs, 194 size I believe. not sure on how many T5 bulbs are used for the indicator lights though.

 

I'd buy 10 of each personally. My 2003 didn't have a single 194, all 74. Was glad I bought both sets

 

Good advice. Thanks

 

Yeah, same here. They changed periodically throughout the years. 3 different versions, I believe. The last two just had a different amount of T5 bulbs needed. 2003's needed the least amount.