I have two quick questions. I have a 90 ST and need to know how to replace the lights that are in the area of the heater and AC controls. Some of these are out and its really bothering me. Also the second is alittle different but i have a Alpine Deck with Rockfords in the back which is newer. But i have been recently getting a high pitched noise coming from the inside speakers whenever i acceralate. The 4 speakers i have in the car or only like 2 years old what could it be and how do i fix it.... Thanks

The speakers might be picking up interferance from somthing else such as power wires, make sure that your speaker cables dont run anywhere near other cables if you can help it.

what he said, as well as to get to those lights ur basically gunna have to tear down half ur dashboard, its not hard just time consuming

yo dogg, howz it goin. i work in the car audio scene and i also have a 92 celica ST, so lets see. as far as your dash lights...if your talking about the buttons right above the heater dial, on the black part of the dash, its a PAIN THE THE ASS. i took my dash completely out of my car in order to paint it (havent done it yet) and it was the worst thing i had to take out of my car. wouldnt recommend it...haha. as far as the humming noise, or ENGINE NOISE, you can try a few things. first, if your power wire is ran down the same side of the car as the RCA cables from the deck, SEPARATE THEM, power down one side, RCA's down the other. still doin it?,...try an alternate ground on the alternator, or even regrounding the amp. if all fails, they do have a filter that your RCA's will run through that should solve the problem. average cost around $20 and can find at most custom car audio shops or even best buy car audio. hope that helps...peace