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Louie
Louie, Technician
Category: Home Theater-Stereo
Satisfied Customers: 11442
Experience:  Have been in the business 25+ yrs., down to component level.
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Boat Stereo doesn't get power. Replaced with Brand New

Customer Question

Boat Stereo doesn't get power. Replaced with Brand New Stereo. NO power. Replaced All Fuses. 100% sure it's wired correctly. Need Help
Submitted: 6 months ago.
Category: Home Theater-Stereo
Expert:  Louie replied 6 months ago.

Hi and welcome to JustAnswer,

Thank you for the question and your patience. Should you still need assistance for information purposes only...

Initially, bear with us; re-confirm and post back with the complete model number of the new stereo.

And do you have access to and familiar with a multi-meter?

Customer: replied 6 months ago.
DUA-AMB600W Dual AM/FM/CD Receiver with Direct USB Control for iPod/iPhone, Built-In Bluetooth 1 1
No Multi Meter
Customer: replied 6 months ago.
Not Familiar with Multi Meter
Expert:  Louie replied 6 months ago.

Can you at least get hold of a test light? ... though a multi-meter is preferable.

Let's go through the basics; a review of the AMB600W wiring:

  • • yellow wire to an always available +12V source such as the battery's + terminal;
  • • red wire to a switched +12V source;
  • • black wire to the ground and/or battery's - terminal.

Can you also please try to temporarily disconnect the red wire? ...and then join it together with the yellow wire to the always available +12V source?

Customer: replied 6 months ago.
All done exactly as you have described. I will have to buy a Multi Meter
Expert:  Louie replied 6 months ago.

Yes please on the multi-meter.

Post back with the model number when able so that I may post information as to what settings and configurations to use the multi-meter.

Customer: replied 6 months ago.
Commercial Electric MS8410A
Customer: replied 6 months ago.
Just an FYI. The setting I have it shown on, I touch Red to Red/Yellow and Black to Black. I do get a reading up to 3.9
Customer: replied 6 months ago.
Hello! Anybody available?
Expert:  Louie replied 6 months ago.

The •200 V~ setting is for AC voltages. We would want it to •20 V--- for DC voltage.

And yes, black probe to black wire and red probe to red and then yellow or even if joined together.

We are expecting a reading of around 12 Volts for the AMB600W to work

Customer: replied 6 months ago.
I get 00. Nothing. I've replace every fuse in the boat. 10 Amp
Customer: replied 6 months ago.
Everything else in the boat works. Lights, pumps etc...
Expert:  Louie replied 6 months ago.

If not a fuse, then possibly a loose wiring connection or even a switch or even a poor terminal connection.

Is there only a single 12V battery? ...or 2 or 3 tied in series?

Customer: replied 6 months ago.
2 / 12 Volt Batteries. Both on and charged
Customer: replied 6 months ago.
Ok. I just switched the accessory toggle switches on. I'm getting a 13.97 reading but radio still not powering up
Expert:  Louie replied 6 months ago.

"...getting a 13.97 reading..." on both yellow to black and red to black pairing?

Customer: replied 6 months ago.
Expert:  Louie replied 6 months ago.

Please press the RESET button behind the detachable face plate.

Customer: replied 6 months ago.
Should I plug it in before pressing the reset?
Expert:  Louie replied 6 months ago.

Yes please; it should be wired correctly, then remove the face plate and using a dull pointed object, press on the recessed RESET button.

Customer: replied 6 months ago.
I'm loosing something when use the little plastic wire couplers
Expert:  Louie replied 6 months ago.

For test purposes, try simply twisting the red & yellow to the +12 source wire and the black to the ground wire. Use electrical tape to ensure no accidental shorting or grounding of the live wires.

Customer: replied 6 months ago.
I should connect Yellow AND Red from Radio to single Red from Boat correct?
Expert:  Louie replied 6 months ago.

For this test purpose yes; i.e. red and yellow together to the wire of the boat (red?) that provides the +12.

Customer: replied 6 months ago.
Absolutely have power reading close to 12. Push reset and still nothing
Expert:  Louie replied 6 months ago.

Please re-check the 10A fuse at the back of the AMB600W.

Do you have a spare 12V bulb? The idea is to see if the boat's red wire and the ground wire would be able to power the bulb / light it up.

Customer: replied 6 months ago.
I'm missing something here. Checked fuse in back of stereo. Looks ok
Expert:  Louie replied 6 months ago.

Try the 12V lamp/bulb to test if the boat's red and ground wire have 'real' power.

Customer: replied 6 months ago.
Not lighting the bulb so it's not REAL power? Yikes. This is ridiculous
Expert:  Louie replied 6 months ago.

The meter gave a residual / ghost 12V reading; no real power.

As posted earlier, please trace the the boat's red wire as well as its ground wire to where they originated from. A likely loose connection, corroded terminal.