hi. it seems as though my car thinks its christmas. just so you know, i did do some searching and infact fiveofakind also posted a simalar problem. the car is a 92 ls400. ive been driving the car for about 2-3 months now. about 3 weeks ago, i had a few dash lights flicker then go off. a day or so later, they flickered and stayed on for about 5-10 min then went off again. the lights illuminating are red brake, battery, low coolant and low oil. now, after the car is warm they come on and stay on. cold starts when i leave the house, there are no lights on. after i drive roughly 5 minutes, they all come on. when they first come on, they do flicker a little. they also seem to turn off with acceleration and braking for a minute or so. then they just stay on. when the dash light rheostat is not turned all the way clockwise, the lights flicker. but once its switched to full bright there are no problems. i suspected an alternator or battery problem. battery is new as of feb. terminals tight and clean. passes a battery load test. alternator puts out a rough average of 14.1 volts at idle. passes under load and no load. load tests are done with my battery/starter/charging tester from caltron. volt tests just with a plain old dvom. the ps pump was leaking and is replaced. this started about a week before i replaced the pump. today, i drove for a little more time then normal and the yellow trac light came on in the middle of the speedo. it was raining so i punched the gas from a stop. trac was dissabled. shut the car off and restarted, light went off and trac worked fine.
i pulled the wiring diagram from all data and it seems the only wire those 4 original lights have in common is the yellow alternator wire. i havent gotten any farther that that as of now. no time for my own junk it seems. i did not test how many amps this alt is putting out either. i figured id post this and see if anyone else has run into this and what they have done.
thanks
bob