Odd electrical issue '96 ES300
#1
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Odd electrical issue '96 ES300
The other day I tried to start my '96 ES 300 to go to work and there was no battery power. Being in a hurry, I didn't spend any time investigating and I just hooked up my portable battery jumper and it fired right up and drove to work with no issues.
After work, I had to do the same thing (hook up jumper, started right up, drove home).
When I got home, I turned off the car and wanting to see if it would start again, I immediately turned the key to start it again.
Here's where it gets odd...when the key is in the ACC or ON position, I have electrical (gauges, lights, radio, door chime, etc). But as soon as I turn the key to START, everything cuts out and there is absolutely no electric on the car.
If I hook up the jumper, then everything is fine. All accessories work, and the car starts immediately.
I have never seen a car where the entire electrical system cuts out due to a low battery. Is this some security aspect of a Lexus where it shuts down? Since all it takes to clear the situation is the known-good jump battery, I am leaning towards the likelihood that the car just needs a new battery, but like I said I have never seen a car that cuts out completely and I wanted to check if anyone knows about this.
Thanks,
Dave
After work, I had to do the same thing (hook up jumper, started right up, drove home).
When I got home, I turned off the car and wanting to see if it would start again, I immediately turned the key to start it again.
Here's where it gets odd...when the key is in the ACC or ON position, I have electrical (gauges, lights, radio, door chime, etc). But as soon as I turn the key to START, everything cuts out and there is absolutely no electric on the car.
If I hook up the jumper, then everything is fine. All accessories work, and the car starts immediately.
I have never seen a car where the entire electrical system cuts out due to a low battery. Is this some security aspect of a Lexus where it shuts down? Since all it takes to clear the situation is the known-good jump battery, I am leaning towards the likelihood that the car just needs a new battery, but like I said I have never seen a car that cuts out completely and I wanted to check if anyone knows about this.
Thanks,
Dave
#2
Lead Lap
here's what's happening, .. .
when you shift to 'start' there is normally not power to anything but the engine and starter motor, that's normal.
at a guess: the solenoid for the starter motor has excessive carbon build up on the connection point's it's shifting. When you try and start the car there is not enough power to breach the carbon build up so the car isn't starting, and it's acting line a dead short.
We had a similar issue, we replaced the battery, then we started to notice the starter would take several tries before it engaged, then it locked 'on' one day and turned while the engine was running until it drained the battery.
when you shift to 'start' there is normally not power to anything but the engine and starter motor, that's normal.
at a guess: the solenoid for the starter motor has excessive carbon build up on the connection point's it's shifting. When you try and start the car there is not enough power to breach the carbon build up so the car isn't starting, and it's acting line a dead short.
We had a similar issue, we replaced the battery, then we started to notice the starter would take several tries before it engaged, then it locked 'on' one day and turned while the engine was running until it drained the battery.
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I have seen cars behave like you describe not having enough power to engage the contacts, but that isn't what I am experiencing.
#5
+1, starter solenoid needs rebuilding. Easy enough job. Did this a year ago. the old was really worn down.
Next time it does not start, tap on the solenoid with a jack handle.
Next time it does not start, tap on the solenoid with a jack handle.
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After that, I was going to go back to my original theory and pull the battery to take it in and exchange it. That's when I noticed the negative battery clamp was completely loose! The clamp nut was completely tightened as far as it would go, but I could lift the clamp right off the post with my fingers.
Two minutes of reconstructive surgery using a pair of 12" channel lock pliers, and the clamp is now tight on the post.
No more starting problems.
Case closed.
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