I just bought a 1990 HZJ77, looking at options for headlights. Are the J.W. Speaker 8700 Evolution 2 plug and play or did they require modifications? Especially with the 24v system.
They have built in voltage regulation and work fine with 24v power; however, they are not strictly plug and play with a negative switched power source that Toyota uses for the headlights. You will need to use a 24v automotive relay to reverse the power so that both high and low beams will work as advertised. This is not necessary with the Truck-lite units, but IMO worth the extra effort and cost for the superior result.
Edit: I went back and edited my original post to include some info on this
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