Quote:
Originally Posted by wpoll
Maybe.... but not always.
BSTs can "soft-fail" where they have enough of a connection for the low current draw (like from a multi-meter) to still allow full voltage to be apparent but when you draw a large current, the voltage loss at the BST become significant and the car won't start. The BST has in effect become a high-resistance joint.
I doubt this is the issue in this case though, as with a high-resistance BST the engine would likely try to turn over but not. Also the electrical load of simply turning on the ignition would pull the apparent terminal voltage down a lot too.
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That is true. For this purpose you should also check the engine bay voltage while starting. But like you said if BST was on partial contact the starter solenoid would likely click even if there was not enough power to rotate engine.