I wouldn't see why not, it still contains semen. By that I mean, since it contains semen I would make the assumption that yes, you can, get HIV via precum
Yes You Can. its contactable from: (woo for Health Class) Vaginal Fluid. Semen. Pre-Cum. Blood. Breast Milk.
You know that little bit of fluid that comes out of the tip of your dick when you just start masturbating. Just oozes out a little bit.
There's a gland called the bulbourethral gland that produces an alkaline clear-white fluid during sexual activity. The correct name for the fluid is pre-ejaculate but the slang term is pre-cum. It neutralizes any acid in the urethra (and in the vagina if you're having sex with a woman) prior to ejaculation.
Precum, like KB said is a substance you CAN produce before ejaculation; it is similar to cum in texture... and everything else we would notice at surface value *cough*.. except is often not as thick and/or white. Many males don't ever experience Pre-cum or just don't produce enough to notice, others can have problems with too much! Generally when people say things like "creamed your pants' etc; it is referring to a person that produced large amount with little to no stimulation.
Pre-cum is a slightly (and I mean like very slim amount) less risky than actual seminal fluid, however it is still a risk because it still contains bodily fluids that can be infected with HIV. Please just be safe and practice safe sex.
