Question about Oldsmobile Aurora

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1997 olds aurora won't crank. battery volts reads 12.5. when i try to crank it, meter reads 5.8. altinater good. starter good. what do i do?

1997 olds aurora won't crank. volts read 12.5. when I try to crank it drops to 5.8. altinator good. starter good. what do I do?

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Battery no good

Posted on Mar 25, 2014

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Car wont start unless I boost it checked battery and it reads 12.43 on multi meter and checked when I boosted it and went up to 14on meter


A healthy battery reading 12.43 should still be capable of cranking an engine fast enough with enough current left over for the fuel and sparks to start - that is assuming the spark plugs, etc. are also in good condition.

An off-load reading of 12.43 means little on it's own and is only one of a number of tests used to determine battery state. The most important test is to measure the battery voltage while the engine is cranking. It is reckoned a healthy battery attached to a healthy engine, starter, ignition system, etc. will ideally read no less than 12 volts - an analogue meter is best for this test.

12 volts is rather optimistic even for a serviceable system. 10 volts is more realistic and some engines will happily start at 9 volts as long as the cranking speed is still good but any lower and either the battery is in a too-low state of charge, is faulty or the starter motor is taking too much current and needs servicing.

Apr 24, 2016 | Cars & Trucks

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My Car Will Not Start.


Many starter problems are caused by week or discharged batteries, loose and corroded cables. Check the battery and the connections at the battery first when having starter problems.
NOTE: please take all safety measures to prevent any harm to you while doing any of these checks or performing any of the test.
PLEASE NOTE: CHECK TO SEE IF YOU HAVE TO HAVE ANY CODES BEFORE YOU DISCONNECT YOUR BATTERY.some cars have anti-theft built into the radios and require a code to re-power the radio after the battery connection is lost.
Check for proper starting voltage:
1.) If you have a volt meter connect a voltmeter to the starter in this manner;Black lead to the starter case; red lead to the [s] terminal, (smaller wire on solenoid), have a helper try to crank the engine over, note voltage reading.
No crank - or voltage less than 12 volts.1.) If the engine does not crank and the voltage is less than 12.0 volts.Check for a problem with the
  • Neutral safety switch
  • Clutch safety switch, (if it has one)
  • Bad ignition switch or bad ground cable from the battery to the chassis/engine.
NOTE: The ground cable needs to be a solid connection to both the engine and the frame or body. Most cars will have a ground connection to the engine and from the engine to the frame or body they will have smaller braided wires.
No crank - and the voltage is more than 12 volts. If the engine does not crank and the voltage is more than 12.0 volts. Using your volt meter, put the red lead on the larger post of the starter (the one with the battery cable) The other black lead on the starter body for a ground connection. Have a helper try and crank the engine, check your voltage meter reading.
If the voltage is less than 12 volts. NEXT: Check the battery voltage at the battery during the Crank cycle.If the battery voltage drops below 9.0. volts Check the battery cable connections be sure they are clean and tight. You may have a bad battery, charge the battery for 30 minutes then recheck.
You can still check your starter problem with out a voltmeter, you can use and old school test light in the same manner as for the voltmeter, you just have to notice if the bulb gets dimmer or not light up.

on Feb 27, 2010 | Chevrolet Impala Cars & Trucks

1 Answer

Why wont my car start it died going down the road replaced starter?


If you put a volt meter on the battery and it reads 12 volts before you cranked the engine and it drops to 10 volts or less when you crank the engine, this indicates you have a bad cell in the battery and you should replace the battery because it is not holding the charge. The loud click sound coming from your starter is because you are not supplying enough voltage to energize it.

Aug 22, 2014 | 1998 Ford Taurus

1 Answer

1997 oldsmobile aurora won't crank. changed battery. volts read 12.5 when i try to crank, volts drop down to 5 or 6. starter good.altinater good. what's wrong?


Possibly a failing security/antitheft system. When it fails, it will turn off the starter because it thinks it is preventing theft of the vehicle, Symptoms sound right.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Mar 25, 2014 | Oldsmobile Aurora Cars & Trucks

1 Answer

Why won't my 92 jeep start? Ihave a new battery and starter


maybe earth strap to chassis from engine. put a multi meter from battery neg to engine, set it to DC volts and crank the engine. should read 0 volts if ok. will read about 12 volts if earth is knackered.

Jul 12, 2012 | 1992 Jeep Wrangler

1 Answer

1997 gmc jimmy starter motor not turning


You need a better battery. When you hook the amp meter and read 0.3 the ECM needs to sleep

Jan 05, 2012 | 1997 GMC Jimmy

1 Answer

When I try to start my car, the battery turns on but my engine won't turn over. What does that usually mean?


My friend, the battery is on all of the time. You don't turn it on and off. If the car fails to start, it could be a problem with a safety interlock system, a failed start solenoid or a weak battery. I am leaning toward a failed start solenoid in your 14 year old car. There is a safety switch on the clutch if manual shift, on the gear selector if automatic and possibly other places as well.

With a volt meter, place the red probe on the starter side of the solenoid (the cable opposite the battery side) and the black probe on ground. Of course you will set your meter to DC at some voltage higher than 12 volts. Have someone turn the key and try to start the car. If you get a reading of 12 volts, I would suspect the starter. If there is no reading, I would suspect the solenoid. While you have the volt meter out, check the voltage of the battery. It should be at least 11 Volts and maybe as high as 13 with the engine not running. With the engine running, expect to see as high as 15 1/2 volts.

May 31, 2011 | 1997 Ford Taurus

1 Answer

Wont start,no sounds no power,completely dead


You will need a volt meter to figure this one out. Battery voltage? Should be above 12 volts, and while you are trying to "crank" the engine over, if it's still over 12, you need to see if that power is getting to the starter motor. If it goes below 9 or 10 volts, you either have a bad battery, or the starter motor is shorted, or bad.
To test the starter, you should have a large wire going to the starter that has 12 volts all of the time from the battery. A smaller wire will have 12 volts only when the key is turned to "start". If you have these and a good ground, the starter motor is bad.

May 30, 2010 | 1997 Toyota Corolla

2 Answers

My 1997 jeep grand cherokee tsi with a 5.2 seems to have a charging problem. the alternator is a year old and was tested twice in the last week at 2 different locations and was shown to be good. same thing...


How is the pigtail ground strap from engine block to body? Have you had engine diagnostic test done? Voltage rVOLTAGE DROP TEST
A voltage drop test is the only effective way to find excessive resistance in high amperage circuits. It's a quick and easy test that doesn't require any disassembly and will quickly show you whether or not you've got a good connection or a bad one.
To do a voltage drop test, you create a load in the circuit that's being tested. Then you use a digital volt meter (DVM) to measure the voltage drop across the live connection while it is under the load. Voltage always follows the path of least resistance, so if the circuit or connection being tested has too much resistance some of the voltage will flow through the DVM and create a voltage reading.
voltage_drop.jpg

If a connection is good, you should find little or no voltage drop and see less than 0.4 volts for most connections, and ideally less than 0.1 volts. But if you find more than a few tenths of a voltage drop across a connection, it indicates excessive resistance and a need for cleaning or repair.
CHECKING THE STARTER CIRCUIT
To check the starter circuit for excessive resistance, you need to measure the voltage drop at the battery, battery cable connections and starter while the engine is being cranked.
The first check is "available battery voltage." For the starter to crank at normal speed, the battery must be at least 75% charged (12.4 volts or higher). Low battery voltage can not only affect the starter but every other electrical system in the vehicle.
A. Set your DVM to the 20 volt scale, then connect meter positive (+) lead to battery positive (+) post (not the clamp or cable), and the meter negative (-) lead to battery negative (-) post.
B. Disable the engine so it will not start when it is cranked. (Ground the ignition coil wire, or disable the ignition circuit or fuel pump relay.) Limit cranking time to 15 seconds or less.
C. While cranking the engine, record the volt reading on the DVM. D. Next, connect your meter positive (+) lead to the battery terminal stud on the starter, and the meter negative (-) lead to the starter housing.
E. While cranking the engine, record the volt reading.
F. Compare the two voltage readings. If both are the same, there are no excessive voltage drops on the positive feed side.
G. If available voltage at the starter is not within one (1) volt of battery voltage, there is excessive voltage drop in the circuit.
The next test is for voltage drop on the positive side of the starter circuit.
A. Make sure the battery is fully charged.
B. Disable ignition.
C. Set DVM on 2 volt scale.
D. Connect meter positive (+) lead to positive (+) battery post, and the meter negative (-) lead to the battery terminal stud on the starter. While cranking the engine, record the voltage reading.
The maximum allowable voltage drop including the solenoid or external relay in the starter circuit should be 0.6 volts or less.
If you find more than a 0.6 volt drop in the starter circuit, you can isolate the bad connection by using the following voltage drop tests.
* Check the positive battery post and cable connection by measuring the voltage drop between the two while cranking the engine. Connect the meter positive lead to the battery post and the meter negative lead to the cable clamp. A good post/cable connection should have zero voltage drop.
* Check the positive battery cable by measuring the voltage drop end to end while cranking the engine. Connect the meter positive lead to the clamp on the positive battery cable, and the meter negative lead to the end of the cable at the starter. Crank the engine and note the voltage reading. A good cable should have a voltage drop of 0.2 volts or less.
* To check the starter solenoid or relay connections, connect the meter positive lead to positive battery terminal on the solenoid or relay, and the meter negative lead to the starter motor terminal. Crank the engine and note the reading. A good connection should have a voltage drop of 0.2 volts or less.
Next, you need to check the negative side of the starter circuit. To check the entire circuit, connect the meter positive lead to a clean spot on the starter motor case and the meter negative lead to the negative battery post. Crank the engine and note the reading. The voltage drop on the negative side should be 0.3 volts or less.
If the voltage drop is too high, set your DVM to the 2 volt scale and start checking each connection on the negative side to find the bad connection or cable. Use the DVM leads to check across each connection while cranking the engine as before.
Check the negative battery post/ground cable connection (should be zero voltage drop).
Check the negative ground cable from the battery to the engine (should be 0.2 volts or less).
Check between the negative battery post and starter housing (should be 0.3 volts or less).
Check between the engine block and starter housing (should be 0.10 volts or less).
CHECKING THE CHARGING CIRCUIT
To check the alternator connections on the positive side for excessive resistance:
A. Set DVM on 2 volt DC scale.
B. Connect the meter positive lead to the alternator output stud (B+ terminal).
C. Connect the meter negative lead to the positive (+) battery post.
D. With the engine running at 1,800 to 2,000 rpm with all lights and accessories on (except the rear electric defroster), check the voltage drop reading. It should be 0.5 volts or less. If higher, the connections between the alternator output stud and battery need to be cleaned. Also, look for loose connections or undersized cables.
To check the alternator connections on the negative side for excessive resistance:
A. Set DVM on 2 volt DC scale.
B. Connect meter negative lead to alternator case.
C. Connect meter positive lead to battery negative (-) post.
D. With engine running at 1,800 to 2,000 rpm with all lights and accessories on (except rear defogger), check the voltage drop reading. On the negative side, it should be 0.2 volts or less. If excessive, the connections need cleaning or the negative cable needs to be replaced. Some alternators are mounted in rubber bushings and have a separate ground strap. If so equipped, be sure to check the voltage drop across this strap, too.

egulator checked with voltmeter?

Nov 15, 2009 | 1997 Jeep Grand Cherokee

1 Answer

Voltage drop test


First, check battery post to cable connection: positive meter lead on battery positive post, negaitve lead on battery's positive cable clamp. Crank the engine and note the reading. A good connection should have zero voltage drop. Second, check the positive cable: positve meter lead on positive battery clamp, negative lead on starter terminal connector. A good cable will show a voltage drop of .2 volts or less while cranking. Third, check the starter connection: positive meter lead on positive battery terminal on the solenoid, negative meter lead on actual starter stud. A good connection will have a voltage drop of near zero volts. Now to check the negative side of the circuit. Total drop on the ground side should be .3 volts or less and can be checked by placing positive meter lead on starter housing and negative meter lead on battery ground post. Take your reading while cranking the engine, and be sure your connection at the starter is solid and clean. If total voltage drop on this side of the circuit is excessive, complete testing at all connections in the same fashion as the positive side of the circuit. Check the following: between battery post and clamp (zero voltage drop), cable end at battery to cable end at engine. (.2 volts or less), cable end at engine to engine itself (near zero voltage drop), and finally between starter housing and engine block (.1 volts or less).

To read the entire procedure for all automotive systems read this artile:
http://www.engine-light-help.com/voltage-drop.html

Aug 31, 2008 | 1997 Chevrolet Blazer

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