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Good battery and alternator yet no power only code scanner lights up with a dull slowly blinking light.There is a clicking sound under the dash that stops if the break pushed or ignition is turn on.

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This battery has been load tested on a battery tester? Everything you wrote screams battery voltage issue.

Posted on May 18, 2017


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Turn lights clicking noise

Without testing the electronic's , hooking up a professional type scan tool an checking for DTC'S - diagnostic trouble code's etc ... we'd only be guessing . Probably the instrument cluster,but that is just a guess . Are you aware that the instrument cluster has a microprocessor an logic . Serial data communication network the modules share info. on ? Your vehicle has 10 or more modules (computers ) . What's the voltage at the battery terminals with the vehicle running ? Viewing wiring diagrams for electrical distribution an testing with a DMM - digital multi-meter would be a next step in the diagnostic procedure ,if no code's !
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I had a routine tire rotation and car alignment on yesterday. As I drove my car later in the evening, the vsc/ecm dash light came on, followed by the brake and battery light, radio and dash lamp lights...

Sounds like you lost the charge from the alternator.
When the alternator quits charging your battery light comes on and your car will run on battery power only...and only for a short time.
As the battery gets its stored energy used up...everything that is electrical will get slow or dim.

I'd check your alternator for proper operation and its drive belt...

Hope this helps...

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All dashboard lights have been flashing for quite awhile off and on which weakens car as it drives and then they disappear and full power returns. Once you kill the car, it won't restart since battery is...

No not the computer or wiring, when the battery goes out the alternator has to work harder. With a weak battery the alternator produces a magnetic flux the flux need to be disapated. Only a good battery can do that. All you bulbs took on at least 15vlts and are rated for 12(it can withstand 16vlts) the 2 lights on the dash any shop can do that or dealer

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When I turn my key the car won't start. It just makes a clicking sound. The radio, interior lights and dash lights come onI but if I leave the key in the aux position all the lights blink and click. I have...

No. It is just the battery. If the alternator was bad then the engine would not stay running when you removed the jumper cables. The alternator is what is supplying power to keep you running. So just replace the battery and you will be good to go!

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My suburban suddenly would not start - no lights -

check your battery voltage for +12volts off,then have the battery load tested and see if its above 10 volts under load test,if it shows ok,then you may have a high resistance ground in the system that needs to be traced probably at the e.c.m. power because of the clicking it sounds like its going thru the self-test before it starts

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Sounds like you may have bad battery make sure your battery is getting the charging voltage of 13,8 volts or higher check it with a volt meter and see if the alternator is working right I've gotten bad alternators one can never be to sure than elminate that problem and move onto the battery make sure its good. it should have 12.6 volts or higher after it has been fully charged or you think its charged . than last check your relays and your fuses make sure there all working good luck

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Lights started flickering battery light came on Dash lights and gages went crazy now wont start

Like you said, battery may be flat. You can check that with a multimeter.

Next check the alternator. Faulty alternator leads to uncharged battery.

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Try disconnecting battery for about 10 mins. or have vehicle scanned and codes cleared

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