finalrep16
Junior Member
Background-
So I have a Zapco I600 amp and 2 poineer 400 watt 10 " subs set up in series in my WRX. I had installed it about 2 years ago with my stock deck and a crossover. I wired the speakers to the crossover and RCA from crossover to amp. I connected the remote lead to the illumination on the wiring harness. The weird thing was that if i turned the key to the ACC position and let the head unit come on the subs worked.. but then turned the car on the subs didnt work. Although if i turned the car on right from off without going into ACC they worked.. so i didnt bother figuring out the problem.
Problem-
Recently i got the JVC kw-avx820 head unit. I installed it and everything is the same accept for the RCAs going from the preamp RCA out on the head unit to the amp and the rempte lead from the amp to the designated remote wire on from the new wiring harness. Now the subs work perfect when key is in ACC position but if i turn the car on NO subs! and if i start the car from off still NO subs! but if i put the car into start without actually turning it over.. they subs work but only intermittently every 5-10 seconds they hit... oddest thing ive ever seen .. so i did alot of troubleshooting.
Troubleshooting-
So i first checked the voltages at the Amp while in ACC 12.5 on the power and 11.5 on the remote. looks good. Then i checked it while car is running, 14.5 on the power and 12.5 on the remote .. Amp powers on which means powers coming and remote lead is working.
Next i got a new set of RCAs and hooked them up just to see if my RCAs were bad ... nothing.. BUT i did find something interesting when i pluged in the RCA only half way without the outside (which i think is the ground) toughing they worked fine.. but if i plugged it completely into the head unit subs stop working. This is also true if i only half way plug the RCA into the amp without the outside touching .. They work!
Next i conneted the remote strait to the 12v power source from the battery and pluged my Ipod directly into the AMP via headphone to RCA wire. And with the car RUNNING the subs worked! then i pluged the remote back to the deck and nothing changed subs still worked with the ipod
Finally i took the harness out of the deck and brought the deck into the trunk and directly connected the power and the 12v constant to the 12v power source from the battery, the ground to the ground and the remote lead to the amp.. with the car running the subs work but only intermittently they go on and off every few seconds...
this is all extremly odd to me and i cant for the life of me figure out the problem ... it cant be the amp or subs or voltage ... something must change when going from ACC to START and then to the engine running that changes something in the deck and shorts the ground on the RCA wires but how can that happen? .. if anyone has any ideas please help me out id really appreciate it thanks alot.
So I have a Zapco I600 amp and 2 poineer 400 watt 10 " subs set up in series in my WRX. I had installed it about 2 years ago with my stock deck and a crossover. I wired the speakers to the crossover and RCA from crossover to amp. I connected the remote lead to the illumination on the wiring harness. The weird thing was that if i turned the key to the ACC position and let the head unit come on the subs worked.. but then turned the car on the subs didnt work. Although if i turned the car on right from off without going into ACC they worked.. so i didnt bother figuring out the problem.
Problem-
Recently i got the JVC kw-avx820 head unit. I installed it and everything is the same accept for the RCAs going from the preamp RCA out on the head unit to the amp and the rempte lead from the amp to the designated remote wire on from the new wiring harness. Now the subs work perfect when key is in ACC position but if i turn the car on NO subs! and if i start the car from off still NO subs! but if i put the car into start without actually turning it over.. they subs work but only intermittently every 5-10 seconds they hit... oddest thing ive ever seen .. so i did alot of troubleshooting.
Troubleshooting-
So i first checked the voltages at the Amp while in ACC 12.5 on the power and 11.5 on the remote. looks good. Then i checked it while car is running, 14.5 on the power and 12.5 on the remote .. Amp powers on which means powers coming and remote lead is working.
Next i got a new set of RCAs and hooked them up just to see if my RCAs were bad ... nothing.. BUT i did find something interesting when i pluged in the RCA only half way without the outside (which i think is the ground) toughing they worked fine.. but if i plugged it completely into the head unit subs stop working. This is also true if i only half way plug the RCA into the amp without the outside touching .. They work!
Next i conneted the remote strait to the 12v power source from the battery and pluged my Ipod directly into the AMP via headphone to RCA wire. And with the car RUNNING the subs worked! then i pluged the remote back to the deck and nothing changed subs still worked with the ipod
Finally i took the harness out of the deck and brought the deck into the trunk and directly connected the power and the 12v constant to the 12v power source from the battery, the ground to the ground and the remote lead to the amp.. with the car running the subs work but only intermittently they go on and off every few seconds...
this is all extremly odd to me and i cant for the life of me figure out the problem ... it cant be the amp or subs or voltage ... something must change when going from ACC to START and then to the engine running that changes something in the deck and shorts the ground on the RCA wires but how can that happen? .. if anyone has any ideas please help me out id really appreciate it thanks alot.
