richroberts 0 Posted August 4, 2007 I have just wired in a new sub, amp and headunit! The headunit works fine, the amp recieves power but nothing from the sub! The only thing im unsure about is the twin rca that goes from my amp to headunit has a little blue lead at either end attached to the rca cables, is this an earth? Is this the problem? all myy other speakers etc are working fine! Quote Share this post Link to post Share on other sites
Jon_vr6 1 Posted August 4, 2007 from what i can remember the blue wire is a remote wire so you can turn the sub off from the headunit you may have to turn it on from the headunit! also make sure the earth is good! hope this helps! Quote Share this post Link to post Share on other sites
richroberts 0 Posted August 4, 2007 does the sub have a seperate earth to the amp? Quote Share this post Link to post Share on other sites
Jon_vr6 1 Posted August 4, 2007 nope just the amp has an earth! make sure fuses are ok! Is the sub brand new ?? Quote Share this post Link to post Share on other sites
richroberts 0 Posted August 4, 2007 it was bought of someone but was only a few months old and was working in their car! Checked all the fuses and there fine, just cant understand it! Quote Share this post Link to post Share on other sites
Jon_vr6 1 Posted August 4, 2007 just make sure everything is connected right! Power cable, rca's are the right way round, blue wire connected to the amp and the headunit, earth securly connected and the wires that connect the sub to the amp are all fine! There must be one thing that you've missed for it not to be working! Hope you solve it! Quote Share this post Link to post Share on other sites
sim0n_parker 0 Posted August 4, 2007 power to the amp from the battery, earth the amp out, and there is a remote wire (blue) that goes from the headunit to the amp so tell the amp to turn on to stop it draining your battery when headunit isnt on, make sure the rcas are connected, if the following owner just yankd the rca's out then they may be damaged (this happend to me) they are very delicate to being stretched etc so if you have a set lieing around that you know work, then try them. also have you got the gain etc turnd up on the amp? some headunits have more then 1 pre out (rca connections) make sure you have the rca's connected in the correct pre out. what headunit you running as i know pioneers have a setting on them where you have to go in and turn the subwoofer mode on, simon Quote Share this post Link to post Share on other sites
richroberts 0 Posted August 5, 2007 thanks for the help, i had a freind with an istall so put his sub in to test and it didnt work,put min into his and it didnt work! So obviously the sub was at fault! Openend it up and it turns out one of the connectors had come off! Nice and easy but frustrating problem! Quote Share this post Link to post Share on other sites
Jon_vr6 1 Posted August 5, 2007 at least you sorted it in the end fella thought it sounded like an easy fix! Quote Share this post Link to post Share on other sites
