Re: Warm engine - no crank
With battery in the trunk, charging cable loss comes into play. Measure the BAT terminal at the alternator and compare the battery posts measurements - s/b less than 0.4 volts difference.
If you have an ext reg alt, use a Wells VR715 reg - electronic, or adjust the OE mech reg to correctly recharge the battery.
If you have an internal reg alt, you may have to move the 'sense' wire to the positive post so alt has a better reference to charge.
And same effect happens when attempting to start. Higher cable temperature, more current loss through the cable - given off as heat. A good measurement to make is to have one meter lead on the positive post and the other lead on the solenoid stud. This measurement will show how well current is conducting through the crimps, lugs, and cables. Yes, you will have to extend one meter lead to make the connection - add the extension and place the ends of the leads together and watch the meter, it will eventually zero itself, then make the measurement. Should be less than 0.5 volts loss for the connections.
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