As far as I know he used very heavy strings 0.12 or more and then a couple of fender amps. when it comes to pedals, he used a ibanez tubescreamer and a cry-baby wah wah (I know he used 2 wah-wah pedals in the studio and fiddled around with them in conjunction)
But most importantly he had the sound in his fingers ( I know it may sound stupid, but somehow it is true)
have fun
//Ken1
I'm no longer young enough to know everything