for future reference the factory grounds in these trucks are horrible and people often have problems with them (usually in the lighting system). As soon as I found this out I pulled all the ground points from both kick panels and replaced them all. The reason I said to use the passenger kick panel as a ground point is because thats where the amp is so you won't have any ground potential between the two audio components. I personally did away with the stock amp when I replaced my radio this way I wouldn't have to worry about it.

 

Well I ran new ground wires and a direct power wire and still had static. I think I'll just do away with the stock amps for the 4" speakers and add a sub instead of the 6s in the rear door. I guess I'll also have to run a cross over up front too.

 

I replaced my factory head unit with a JVC, and I encountered this problem also. My static is coming from my stock tweeters, the only speakers that have not been replaced in my Disco. I am still looking for a way to fix it, when I find a way, I will post it. Is your static coming from the tweeters in the A pillar?

 

roverlax your tweeters are run in parallel with your front door speakers so if you are getting static on just the tweeters and not the door speakers then your problem is most likely with the speakers and not the signal (unless the tweeters were rewired and are getting there own signal and not connected to the mids on the door), the A posts just pop out, and the tweeters can be accessed that way just remember to put a capacitor in line to protect them from low frequencies (you can buy caps designed for this purpose from most audio retailers including best buy, or you can research the frequencies online and figure out what size will work and buy them at radio shack for much less) if you don't mind spending the extra money there are many low wattage component sets that come with crossover networks that will probably sound quite a bit better.

 

I have crossovers, and I have aftermarket tweeters, I just got lazy and did not feel like trying to run the tweeter's speaker wire from the crossovers in my door up through my a pillar, so I left the stock tweeters where they are. Every other speaker has been replaced. The rear doors are coaxil, the front are component, and the crossover is mounted in the bin on the bottom of the door. How do you pop off the A pillar? I tried, a while back while installing this, but to no avail.

 

it should be just held in with clips, may be a bit tight try getting a screwdriver (or an upholstery removal tool) in from the top and prying it.