alternator and engine noise

i had a problem like that recently and someone on here recomended grounding the rca's/radio and it worked......

well first of all i'd start with the hi to low converter that is being used. also heres an important part, and mainly on fords..did you upgrade your grounds by the battery to the chassis.easily you can track this unwanted noise. get yourself a multimeter, and measure the reswistance in your ground. with your multimeter hook up one side to your battery neg terminal and the other test all your grounds on your radio for starters, ive had this happen too many times to count.....even if its a factory unit. when you measure the resistance it should be no greater than.03 if its higher theres your prob, but like i said check your high low converter, make sure you get one that has a ground wire to be able to ground the loop.installers do it best. we got the magic hands!

calijtee1 wrote: well first of all i'd start with the hi to low converter that is being used. also heres an important part, and mainly on fords..did you upgrade your grounds by the battery to the chassis.easily you can track this unwanted noise. get yourself a multimeter, and measure the reswistance in your ground. with your multimeter hook up one side to your battery neg terminal and the other test all your grounds on your radio for starters, ive had this happen too many times to count.....even if its a factory unit. when you measure the resistance it should be no greater than.03 if its higher theres your prob, but like i said check your high low converter, make sure you get one that has a ground wire to be able to ground the loop.

but my hi to low it's the audicontrol LC7, you think there might be an issue with the ground on it?..........i'm going to try the resistance mesurement, and then the audiocontrol to see what happens, i'll keep posting the results...........thanks man.