I'm In Warning Light Hell!

[Bill O']

The low oil level warning light on my '90 LS 400 has been coming on and off intermittantly for more than a year (oil level is fine). I assume it's the sensor in the oil pan but have not had the time or $$ to get it fixed.

Next, I experienced the broken white-black ground wire in the trunk hinge problem with the strange transmission behavior and reverse light coming on when you step on the brake. I soldered the broken wire and the problem went away.

Now I'm getting the Battery, Parking Brake, Coolant, and Bulb-out warning lights all coming on at the same time intermittently.

I have a 4 month old alternator, have reset the ECU, bought a new battery (had terminals serviced and alternator checked by Sears at same time) and called Lexus to see if they had any idea what was up. Predictably they said “bring it in and we’ll see if we can troubleshoot it (and bring your checkbook).

Any suggestions what I should try next?

[mehullica]

Sounds like a bad alternator