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Does the engine crank at all ? The low whine could be the starter turning but not engaging the flywheel. The clunk could be when the bendix gear on the starter makes contact with the flywheel. If the starter does not have enough voltage, the solenoid or bendix may not engage. Even tho you replaced both the starter and battery, there could be a problem with the cables or the ground connection.
There are only two problems with electrical circuits. Too much amperage or too little amperage.We have to determine what you have.
An excellent test is to put your test meter red lead on the positive battery post and the black lead on the negative battery post. Crank the engine and record the voltage. Then place the red meter lead on the starter's battery terminal and the black lead on the negative battery post. Again crank the engine and record the voltage. The two voltages should be with in one half volt of each other. If the voltage difference is greater that one half volt, there is a resistance in the circuit, somewhere. I would expect the voltage to drop a volt or two, max
If the voltage dosent drop, there is high resistance resulting in low amperage. If the voltage drops too low then there is low resistance resulting in high amperage.
High resistance=dirty terminals
Low resistance = shorted wire, slow turning cranking motor maybe caused by bad starter, bad battery or hard to turn engine. ( engine bad, alternator or power steering pump bad, a/c pump bad, etc)
Can use head light for test. Turn on lights and note the brightness. Crank engine. If while cranking, the lights stay bright= high resistance.
If lights go dim = low resistance.
Does the starting solenoid engages? This is would sound like a deep clunk on your starter. When the solenoid engages it close the contact that energize the starter motor, but a worn contact on the solenoid would result in it engaging but not having enough current to turn the engine resulting in a clunking noise when you try to start.
The starter solenoid gets its 12 volt from a relay. This is referred to as the starter relay. If you try to crank, and you hear only a click but the starter do not turn, then the contacts on the relay maybe worn.
To sum it up, if you hear a loud clunk when it dont crank, its the starter solenoid. If you hear just a click but no crank, it could be the starter relay.
you have 3 choices.
1) Bad battery
2)Starter motor solenoid is inoperative or starter motor itself is inoperative
3) your engine is locked up
How old is your battery and are the connections to the starter motor good?
Do you hear a clicking noise when you try to start the engine?
Do you have a clunk noise when you try to start it?
If dirty connections then clean the terminals andtry to start engine.
Clicking noise means starter solenoid is picking up but starter motor is disunctional and needs replacement.
If the noise is a clunk then your engine is locked up for whatever reason.
Last but not least if you hear the starter motor runningand a metalic grinding then the star is bad on the starter motor which means replacement of same.
Does the engine just give a clunk when you turn the key or make no sound at all?
If it gives a clunk, most probably the contacts in the starter motor are burnt or you may have a bad connection on one or more of your heavy duty cables may have a loose or corroded connection.