My battery indicator is in the red.. measured 11.9 volts at cold off battery and 9.9volts running. alternator is shot but is it safe to still drive in the red? if i do not use any radio, air con, power win,,,etc.can i continue to drive on?
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Re: LOW BATTERY INDICATED
No this is not safe to continue to operate. The computer in these vehicles generally requires about 10 volts to operate as they should.
Under powering them can spike them and cost you an ECM.
This constant draw on your battery is also not good for it. After about 4-5 cycles of charging and driving you will find the battery coming back for more; less and less. Automotive batteries are not designed to withstand complete drain and repeat charging like deep cycle batteries and will fail in a short period of time in these drain/recharge cycles.
I would not operate this vehicle under anything less than an emergency situation.
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This usually indicates the battery has a shorted cell. Here is how you can test it. With the engine not running, take a digital voltmeter set to volts function and read the battery voltage. It should read at least 12.3 volts. If the first two digits are 11, then your battery is bad. If you show a battery voltage over 12.3 volts, then you probably have a bad alternator. Beyond that, I need more details, like, does the engine crank ok? Are headlights dim when engine is stopped? What does "battery gauge very high" mean? What is the make of the vehicle?
Not sure but I believe the GMC Yukon has an in line fuse in the charging line. If so the output of the alternator will not get to the battery. One way to check is to measure the voltage, when the engine is running. At above idle it should be over 13 volts. Then measure the battery voltage, it should be almost the same within 200 to 400 mVolts. If not the charging line is open. Also if the alternator charging terminal is the same as the battery (12 to 12.7V) while the engine is running, that again indicates the alternator internal regulator is bad. If you turn on the headlights with the engine running above idle and the alternator output drops over a volt or so, the alternator is bad. This measurement can be taken at the battery plus terminal or the alternator charging output.
You see that with a low or high volt problem or a bad battery. The battery is the most common and if yours is original then its due. Most batteries last 4-6 years before needing replacing. You can take this to any battery place or service shop and have them check the battery. If you have a volt meter you should see 11-12 volts and 13.5-14 volts when running. If you measure first resting then started voltages you can tell if the alternator is working ok by the running voltage. If it is working then the problem is the battery and the lower the voltage you see the worse it is.
Cold cranking amps refers to the maximum current output of a battery when the engine is being cranked in cold weather. This would be indicated as part of a battery test. If the reading is low, the battery will need to be replaced soon.
P0344 Camshaft Position Sensor Circuit Intermittent
P0700 Transmission Control System Malfunction
P0562 System Voltage Low
I would start with the P0562 issue. Check the battery voltage - it should be at a minimum of 12 volts (DC). You can try charging the battery with a trickle charger overnight and if the voltage does not come up to 12 volts then you should replace the battery. If it comes up to 12 volts then try starting it up if it starts you should get the alternator checked out at a garage. A simple alternator check is measuring the voltage at the battery you should get between 13.2 to 18.2 volts when the vehicle is running. The low voltage may be the cause of the other two codes. If not the P0344 indicates you may need to replace the sensor or if the timing slipped you may need to replace the timing chain / belt. The P0700 could indicate a low fluid condition or it may mean take it to a transmission mechanic.
To get an accurate voltage reading on the alternator, measure across the battery while the engine is running at 3000RPM. It should read between 13.5 and 14.5. If it's low then shut the car off and look on the back of the alternator for a large red wire ( it should be on a terminal marked B+) and make sure the terminal is clean and shiny with no trace of green gunk (corrosion). Clean up the small blue wire too. Do the same with both battery cables. Check the tension on the drive belt. It should only move about 1/2 inch when you push down on it. Retest for voltage. If it's still low then you have probably damaged the alternator when you unhooked the battery. NEVER unhook the battery cables on a VW when it's running. Hope this helps.
Always check the fluid level in each of the battery cells and top up with distilled water as required.
Using a multimeter you can assess th health of your car battery and alternator:
With the engine off, measure the volatge at thebattery terminal: it should show 12.5+ volts, anything under or around 10.5 volts indicates a shorted damaged battery cell -> bad battery!
With the engine running, the voltage reading at the battery terminal should indicate around 13.8 volts and anything under 13.5 volts and over 14.5 volts indicates a bad alternator and/or alternator regulator.
The light comes on because it is not receiving the proper signal from the electrical circuit. Before you replace any parts take a 1/2 hour and some emery cloth and make sure that all the connections are tight and making good contact. Do the battery cables at the battery and the wires that attach to the alternator, including the plug-ins. Also clean up the ground wire that runs from the battery to the body. If the light is still on then get both the alternator and the battery tested. The alternator should read above 12.5 volts, preferably 13.5 to 14. It might be a new battery but get it "load tested". This is a measure of your battery's ability to retain voltage. A reading in the area of 11 volts after the test is an indication the battery is dying or not big enough to do the job. 500 CCA is a good size for a battery, less is working it harder and wearingit out faster. Hope this helps.
Not necessarily,this can also be caused by poor battery cable connections or a bad battery cable or a bad connection to the gauge or just a bad gauge.Check or have them checked first,and then have the alternator output tested,a voltmeter connected at the battery posts should measure 14.5 to 14.8 volts at an idle,any lower than this than the alternator is the problem.
start the vehicle up and unhook the pos cable from the battery if it dies its going to be a bad alternator or the battery has gone bad.one sure way to know if its the alternator is to un hook the pos cable while the car is running.they can test good even when they arent.