Lexus Troubleshooting Questions? Ask a Lexus Expert
Hi, I'm Greg (Indy-Tech).Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP.Rgds Greg.
Do you have a voltmeter to do a few voltage checks .
Okay good , what is the voltage of just the battery .
What is the voltage of the battery when the engine is running .
With engine running 14 volts good,
what is the voltage when you try to start the engine .
What does the voltage drop to when trying to crank .
Let me understand this jump start from another vehicle ?
or jumping from the battery to the fuse box .
Okay then you have a problem with the connection on the battery or the battery cable is bad .between the battery and the main fuse box is a connection issue .
Check voltage on the centre of the battery post then check the voltage on the battery clamps to confirm battery and clamp connection .
But looks like a typical battery connection or a bad battery cable .