Question about 1989 Chevrolet Caprice
When you state the car starts, then 2 hours later it doesn't, do you mean that it will run for 2 hours and not restart...or with the car shut off afetr running 2 hours it will not start?
If it doesn't start after running 2 hours it is safe to say you have a loose fan belt or a bad alternator that is not charging the battery properly, if you have a Auto Zone or the like parts store nearby they will test your charge system for free and tell you what the results of the test are also letting you know how much the defective parts are for you or your helper to repair the vehicle.
If the vehicle sits for 2 hours after running and wont start, I would first check the battery terminals for corrosion(white matter on the battery posts causing a no start condition) clean them wearing safety goggles and mechanics gloves, using a battery brush with a solution of arm and hammer and water mix, to break down the corrosion properly, and retry starting.
If vehicle has a dead battery with clean terminals, to verify this without any test equipment, use what the vehicle has onboard to test the condition with: try turning on the head lights, do they go on? yes? Then the battery has power, keeping the head lights on turn the key to the start position:
Do the head lights dim way down? If yes, you have either a bad battery which can be tested with a $2.00 cell float tester as directions suggest, or the starter is drawing to many amps (shorting out) not allowing the vehicle to start.
Also test the system for a possible electrical drain with the use of a hand held battery 12 volt test meter: hook the meter to the battery, positive(red cable) to positve and negative(black cable) to negative, on the 12 volt scale labeled DCV volts(Direct Current) the battery should read 12.5 volts with all electrical systems off, if the battery is lower then 12.5 volts the battery either has a defective cell(not enough amps to start) or you have an electrical draw while the car is sitting causing the battery to drop voltage, things you want to check if a draw is present would be the obvious, a brake light switch that sticks causing the brake(tail lights) to stay on, in the trunk or under the hood mercury swith light may be lighting up and hard to detect, best way to test is to disconnect the switches and see if the problem corrects itself after the battery gets a good slow charge.
While checking the vehicle for a loose fan belt, be sure the car is off keys out of the ignition, reach down to the fan belt pulley on the face of the alternator and by hand try to turn the pulley.
If it turns without severe resistance against the fan belt the belt is either stretched and needs replacement or the belt needs to be tightened.
These are about the common ordinary scenarios that you may commonly find as the cause of the no start you mention, if the starter tests bad always replace the starter motor and the starter solenoid together as a unit you dont want to do a job twice for the same problem.
The alternator will have a voltage regulator built inside it so you can only buy it as a duo combination should the alternator test bad.
If your alternator fan belt has grooves in it, be sure and needs replacement be syre to buy the correct V and numbered grooved belt for your car, to eliminate any complications bring the old parts with you to the auto parts store for match ups, I highly recommend this everytime if possible.
Posted on Jun 05, 2010
Replace the altenator
Posted on Jun 05, 2010
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Posted on Jan 02, 2017
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