Just put on a Kenwood DDX912 Head unit, everything was fine untill I lost battery and had to charge up. Battery test fine and I started truck since, but when I stared grooming the wires is when the truck wouldn't start. Lights,key alarms,horn all work fine. When I turn the key...nothing...no clicks ...nothing! did I mention I also have a Viper 5900 with remote start
Radio could be wired wrong. Check the constant and accy power on the radio with a multimeter and make sure you are getting 12V on the constant and getting 12V on the accy only when the car is in accy or on. Also make sure the wire harness is properly wired. This can happen often if the radio constant and accy power wires are wired in reverse.
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Most cars do this including the head lights , so the starter and ignition have less drain while starting. not sure if your model does this, If every thing is ok after starting nothing to worry about. If it wont start clean the battery terminals and check charging rate and battery.
Much of the time this is a faulty alternator. It may be charging fine, but when the engine is off may still have a draw on the battery. To start with, you need a test light. Disconnect the negative battery cable. Connect the test light lead to the negative side of the battery and touch the test light probe to the negative cable. If you get a light you have a draw on the battery. that means the battery will be drained in a short time. Disconnect the alternator. If the light goes out it's a faulty alternator. If the light stays on, start pulling fuses one at a time until the light goes off. Do not pull all of the fuses at once! Pull one, if the light doesn't go off, put it back. When the light does go off, whichever fuse it controls is the problem. It's really not that difficult. Good luck.
this sounds like a bad alternator, that is the job of the alternator besides powering your car after start up, the alternator should keep the battery charged, believe it or not cranking your car is the only job your battery has unless you just switch you ignition to accessory, once you start the car everything runs off the alternator , a quick test for the alternator is this , crank the car and very temporarily unhook the positive battery cable, if the car does'nt die after 2 or 3 seconds the the alternator is putting out a charge
need to do a battery draw test. remove the negative cable from the battery, and clip a test light to each connection of this cable and battery. with the key out of the ignition there should not be a light on in the test light, if there is, remove the fuses one by one to find the circuit that is draining the battery. also keep in mind that an over charging altinator can give this symptom. the altinator should be as follows.
no less than 12volt
and no more than 14.5 volt. any higher can over charge the battery and fry it out, as well as give too much voltage to the computer of the vehicle. if none of this applies, then there is a wiring problem.
get a12 volt test light remove negitive cable from battery attach clip on test light to negitive cable removed from battery. touch other end of test light to negitive side of battery if light is on something in car is pulling power if light is off everything is turned off you can test this if light is off by turning on the headlights the test light should stay lit until you turn off headlight switch. If light is on when fistr connecting to battery turn every thing off in car or disconnect anything includeing trunk or under hood lights one at a time until test light is no longer lit. if this is not the problem load test battery.
The most neglected part in this system is the battery. Have your battery tested for retaining the charge, some of the cells can fail and your battery will not retain the charge, even after a long drive.
Try starting it with a booster battery, if your problem disappears, you just need a new one.
If the engine is turning over and it still wont start try shooting a little starting fluid in the air cleaner to see if it will run .. if so your fuel pump is either bad or the fuel filter is getting dirty.. thanks and holler if you need more Jerry