I have a Magnum mb210sp amp. Not getting power to amp. I notice that the ground was not connected. I reconnected the ground. But still no luck. I put a meter on the 12 volt supply and notice that the voltage was only 6 volts. Is low voltage my issue?

Here you go - this covers the 50/90 2001 & 2002 - Good Luck. I know people roll their eyes when they hear it - but I've seen it more than once...check every connection. Grounds. Everything. One loose ground will mess up a lot of time. All The Best, Justin McCartney

Notice the black mic plug has the numbers it is solder by numbers. Used rosin core silver solder radio shack sells it.
Mic Wiring
Stock
1-Shield (ground)
2-Yellow (audio)
3-Red (transmit)
4-White (receive)

Astatic
1-Shield & Blue
2-White
3-Red
4-Black
Yellow NC
Turner Roadking 56
1-Shield & Red
2-White
3-Blue
4-Black
Yellow NC
Sadelta the is a BASE mic
1-Shield
2-White
3-Brown
4-Green

Probably a bad ground to the frame at horn . Check for grounding &/or black wire ground to frame. Clean with emery cloth or sand paper. Good luck!

check www.cbtricks.com

If the light is all that is on then it will be fine. It would take days to weeks for it to kill todays car batteries. If the amp is drawing more power than just that though, I would move the remote wire to the ignition or the headunit, because the fusebox is getting constant power to tell the amp to stay on.

Hello markrich78,

First determine if it is the amp or the wiring that is causing the problem.

Disconnect all wiring except ground, power and remote turn-on and see if the amp powers up properly. If it doesn't, the amp itself is defective and needs professional repair or replacement. If the amp powers up OK with just ground, power and remote turn-on connected, check all of your other wiring for shorts and grounds, or reconnect them one at a time.

Hope this helps.

Hello whatup_132,

If the M605 fails and displays "CUR", it means that there is excessive current to the amp.

The most common causes for excessive current draw is operating the amp into a lower impedance than it is rated to handle, shorted speaker voice coil(s), and/or shorted or grounded speaker wires.

The amp can operate into a load no lower than 2ohms. First power everything off and disconnect the positive amp power lead temporarily (easist way is to just pull the fuse). At this point you should ONLY have the ground and remote connected. Reconnect positive (insert fuse) and turn on the vehicle ignition and your head unit. If the amp still displays the "CUR" error, the output MOSFET's are probably defective and the amp requires repair or replacement. If it powers up normally, reconnect the speaker wires until you locate the faulty one, and then correct whatever is causing it.

Hope this helps.

Start by dis-connecting the power lead at the amp, and securing it (where the bare wires are not touching ground) Now insert a new fuse then make the battery connection. If the fuse blows then you need to trace the power wire to find the short, or replace the entire wire, paying close attention to sharp edges and pinch-points that could cause this problem to reoccur.
If the fuse didn't blow, dis-connect the power lead at the battery then all of the other connections at the amp, reinstalling the power lead to the amp. With only the power lead connected at the amp and the good fuse inserted, reconnect at battery,and if the fuse blew then the problem is with the amp. and should be repaired or replaced depending on its value and the cost effectiveness of those two options.
If the problem has not yet been discovered, continue with tracing each of the remaining amp wires in that manner, as been described above.
Good luck...

You may have a poor ground connection to the cluster, most likely the cluster connector is at fault, pull it out and reconnect it, it is at the back of the instrument cluster, also the Body Control Module can cause this. Have a quick test run to check for any trouble codes in the BCM

hello, it seems that you may have a bad ground on your amp? turn everything off(pull amp fuse at battery) and go to the amp ground and clean paint away to bare metal! secure ground tight and make sure the car battery is not low voltage! this may stop the pulse! the sound problem of no sound in speakers, if still there! make sure the speakers are not shorts or pinched to ground! this could damage the amp! hope this helps, good luck!

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/michael_8fc219ce5f384208