I am agreeing but disagreeing with 235 Fat Fender and Brian56. Yes, DO put in all new wiring as they recommend but I don't just tear the old stuff out by the roots. I used the old wiring 'paths' as a guild. Either make very good notes or take a ton of pictures, you can't take too many, of the wiring if you are going to start with a 'clean slate'. You may also need to renew the gromments and sleeves at pinch or rub points. If you just pull it all out at once you may not remember where these need to be.
