I just got around to installing the 100/90W Hi-Grade Head Lamp Tune UP kit which I had purchased from the Bronco Graveyard last year.

1995 full size Bronco E.B. 5.8L E4OD. As far as the headlights go: 1 bulb does both High Beams and Low Beams.

On the paper sticker on the cardboard it says:

47-3662 PO 1639038S 20161121
Made in Taiwan.

On the yellow with the red border label stuck on the clear plastic hang tag cover it says:

90/100W
D4
100W High Beam
90W Low Beam
50% UP
High Beam 2000
Toyota 1A
the box next to "9007" is checked

I followed the directions, everything plugged in like it should. And high beams are working fine, but I have No Low Beams!

Any suggestions?

SOLVED: "Mechanics look to the component. Electricians look at the wiring."

I am neither, but am trying to become more of an electrician...

So my Bronco's 9007 headlight plug on the passenger side had one of the little holder clips broken off -- the one that plugs into the aftermarket Hi-Grade harness. When I pushed the plug in farther than the clip could hold it, the low beams (as well as the high beams) worked.

So now I am off to ebay to buy a 9007 replacement plug.

And in the meantime I will zip tie the plugs together tightly.