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  #1  
Old 08-28-2015, 12:20 PM
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Default Problem!! Help please.

today i decided to swtich my systems around between my 2 vehicles. 2002 xterra with a incriminator i10 and a JL250. 1999 pontiac grand prix with a incriminator lethal injection 12 and a soundqubed 1200. so i switched these 2 systems around. problem is i have the i10 and jl in the grand prix. with ignition on AUX it runs fine. but when i start the car the amp immediately goes into protect. i have no idea whats causeing this. electrical in the grand prix is stock alt stock batt sky high 1/0 and sky high big 3. 0-4 reducers. HU is a pioneer 7500hd. but the q1200 and lethal injection works fine in both vehicles.
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Old 08-28-2015, 12:48 PM
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Turn off the car
Unplug the rcas then turn it back on
If it stays in protect power down and disconnect the speaker
Then try with the rcas in


You must not plug or unplug the rcas with power on the radio
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Old 08-28-2015, 05:15 PM
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That doesn't explain why it will play normal with the car off. But go into protect when it's on.
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Old 08-28-2015, 06:05 PM
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Pull out your DMM and check voltage on the remote turn on wire and the 12 volt positive. Also check your fuse up front for corrosion and physically pull the fuse out to see if it is in tact. You may have voltage drop at the fuse block if it is partially broken. Also check your ground wire and location. Sanded metal and a solid spot with thick sheet metal.

Same thing happened to a buddy and I just glanced at the fuse and it "looked" fine but after trying new grounds, new turn on, switching impedance on the sub, I decided to pull out my trusty old DMM and it showed that I only had 9 volts on the power wire. When he would start his car, the fuse would just contact enough so it would read 12 volts and allow the amp to play for a couple seconds then immediately go into protect again dropping down to 9 volts.

If it's not a bad ground and you have 12 volts at remote turn on and power wire, then idk whats the deal with your amp.
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Old 08-28-2015, 10:36 PM
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Quote:
Originally Posted by lukeman269 View Post
Pull out your DMM and check voltage on the remote turn on wire and the 12 volt positive. Also check your fuse up front for corrosion and physically pull the fuse out to see if it is in tact. You may have voltage drop at the fuse block if it is partially broken. Also check your ground wire and location. Sanded metal and a solid spot with thick sheet metal.

Same thing happened to a buddy and I just glanced at the fuse and it "looked" fine but after trying new grounds, new turn on, switching impedance on the sub, I decided to pull out my trusty old DMM and it showed that I only had 9 volts on the power wire. When he would start his car, the fuse would just contact enough so it would read 12 volts and allow the amp to play for a couple seconds then immediately go into protect again dropping down to 9 volts.

If it's not a bad ground and you have 12 volts at remote turn on and power wire, then idk whats the deal with your amp.
just odd that minutes before i switched the two. both systems worked fine no problems what so ever. rechecked all connections everything is fine. still goes into protect with RCAs out
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Old 08-28-2015, 10:46 PM
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Unhook the remote and jump power over to it to eliminate it as an issue
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Old 08-28-2015, 10:52 PM
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Quote:
Originally Posted by Stevie View Post
just odd that minutes before i switched the two. both systems worked fine no problems what so ever. rechecked all connections everything is fine. still goes into protect with RCAs out
Did you meter your wires though? It makes no sense that the amp won't run when the car is running, but it works fine with ACC. Either your amp is bad or something with the wiring is bad. I have never had issues with RCA wires causing an amp to go into protect. The only way I see RCA cables causing an amp to go into protect is if you were running an 8 volt line driver and you were clipping the crap out of the signal lol.
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Old 08-28-2015, 11:10 PM
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It's your alternator
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Old 08-28-2015, 11:19 PM
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Try jumping the xterra to the pontiac with some using jumper cables, that will eliminate electrical. when I looked up the alternator for a 2002 xterra it looks like it puts out 70 amps
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Old 08-28-2015, 11:20 PM
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decided to check the fuse. looked fine. decided to flip it around. now everything works -.- WTF. alternator is slowly going out anyways. >.> it will get upgraded next year.
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