Thread: new battery, no juice

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"High resistance = low amps, and not hot cables." WEll...this is kinda correct...but not quite... High resistence thru a cable or connection will mean LOW voltage and there will be LOW amp flow...A Hot cable means whatever you are trying energize something it is drawing to many amps and the Voltage to this unit will be low.[starter] If the battery cables are too small they cannot carry to load and get warm.

So...make sure the cables are the correct size for your application. Insure that you have good connectiosn at the battery,starter relay and starter, Make sure your ground is clean and tight, Disconnect the coil wire andcrank the engine....if it cranks ok, the timing is set too high.

[QUOTE=moter;341414]"High resistance = low amps, and not hot cables." WEll...this is kinda correct...but not quite... High resistence thru a cable or connection will mean LOW voltage and there will be LOW amp flow...A Hot cable means whatever you are trying energize something it is drawing to many amps and the Voltage to this unit will be low.[starter] If the battery cables are too small they cannot carry to load and get warm.

Ok, I think I see what you are saying... high resistance cables will heat with low amps. Ok, that makes sense. And of course, since the voltage drop is across the cables then the voltage to the starter is low. AND since the circuit resistance is higher, then you have low amps.

If it started with old battery and old cables before, chances are problem is a ground or something in the starter(considering you do have a fully charged new battery). It could be cables, but my bet is one of the other two.

[QUOTE=firebird77clone;341440]

Originally Posted by moter

"High resistance = low amps, and not hot cables." WEll...this is kinda correct...but not quite... High resistence thru a cable or connection will mean LOW voltage and there will be LOW amp flow...A Hot cable means whatever you are trying energize something it is drawing to many amps and the Voltage to this unit will be low.[starter] If the battery cables are too small they cannot carry to load and get warm.

Ok, I think I see what you are saying... high resistance cables will heat with low amps. Ok, that makes sense. And of course, since the voltage drop is across the cables then the voltage to the starter is low. AND since the circuit resistance is higher, then you have low amps.

Think of it this way...If you have a confirmed good battery, and the starter cranks slow, it will be slow because of several things: Battery cables not correct for the application and CANNOT carry the load,Starter itself is defective and draws more amps than it is suppsed to. Poor connection on either cable. Anyways, as Amp draw goes UP the voltage will decrease...if there is too high of a load for the battery cables to handle they will get warm... Connect a volt/amp meter to your battery and start the car..when it first starts the volatge wil be lower than 14 volts and the amp reading will be higher than zero because the alternator is trying to bring the battery to full charge. As the battery becomes fully charged the AMP reading will go down and voltage up.