please help me with my pulsing lights!!!!
#16
Lexus Champion
Would putting a more powerful alternator in the car help this problem? I know it's a strain sometimes when I have the headlights on to close the windows and the sunroof at the same time... really annoying as sometimes they do a pinch-protection thing and go back down halfway
#17
Intermediate
Thread Starter
i pulled into the garage and had the car running and was watching the headlights. they were pulsing pretty good. i turned off the car and obviously the pulsing stopped.
could it possible be a plug wire???
i know it sounds dumb but is it possible?
could it possible be a plug wire???
i know it sounds dumb but is it possible?
#18
Intermediate
Thread Starter
i checked the ground connections and all seems ok.
so i started teh car and watched the lights. the 1st 5 seconds or so, no problem then it's like something electriocal kicks in and the lights start to flicker
so i started teh car and watched the lights. the 1st 5 seconds or so, no problem then it's like something electriocal kicks in and the lights start to flicker
#19
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#21
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Join Date: Jun 2003
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Just for reference, my 2000 solara did this and my 99 solara does it. I thought it was a problem but i guess its not since both of my cars have done it. I have heard that upgrading to the 130 volt Highlander alternator fixes this problem
#22
Intermediate
Thread Starter
i just replaced the alternator that contains the voltage regulator too
#23
Intermediate
Thread Starter
i checked all grounds and fuses in the engine bay and all is well.
i replaced the ground wires on the passenger side that have the disconnects in the middle to make sure that the connection wasnt bad. i used thicker wire also. it did not help so i reinstalled the old ground wires.
what next?
i replaced the ground wires on the passenger side that have the disconnects in the middle to make sure that the connection wasnt bad. i used thicker wire also. it did not help so i reinstalled the old ground wires.
what next?
#24
Intermediate
Thread Starter
update............................
i started to pull fuses in the engine compartment. i started to pull a few at a time. keeping the ones that are important to keeping the motor running, i pulled things like the radio, heater etc.
then i finally got to the a/f htr fuse.
this is the air fuel ration sensor
once i pulled it the lights were normal and i had no pulsing, i reinstalled it and it pulsed.
i tried it a few times and this seems like the culprit.
any help with this discovery would be helpful
i started to pull fuses in the engine compartment. i started to pull a few at a time. keeping the ones that are important to keeping the motor running, i pulled things like the radio, heater etc.
then i finally got to the a/f htr fuse.
this is the air fuel ration sensor
once i pulled it the lights were normal and i had no pulsing, i reinstalled it and it pulsed.
i tried it a few times and this seems like the culprit.
any help with this discovery would be helpful
Last edited by dallison; 03-21-07 at 05:08 PM. Reason: adding info
#26
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I remember reading something about this i think. Both A/F sensors come on at the same time causing the power loss. I think they are supposed to go on one at a time so its probably a flaw. I dont know if there is a fix.
Last edited by lexusls430; 03-22-07 at 09:19 PM.
#27
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#28
Intermediate
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ok tonight i unplugged both o2 sensors, one at a time, and still had the pulsing.
i then unplugged one sensor at a time that i could reach, and still nothing.
i unplugged the harness on the alternator and then the tps, and still nothing.
i unplugged the fans and prob a total of 10 -15 sensors w/o any luck.
i then looked at the fuses/relays connected to the battery, i located a a/f htr relay. i unplugged it and the pulsing stopped.
so i am getting somewhere. so i wrote down the info on the relay and found one on fleabay. i offered $6 from the $10 buyit now price plus shipping of $5 so hopefully it will cost me $11
does this sound like a relay could be bad?? esp after i disconnected these sensors?
i then unplugged one sensor at a time that i could reach, and still nothing.
i unplugged the harness on the alternator and then the tps, and still nothing.
i unplugged the fans and prob a total of 10 -15 sensors w/o any luck.
i then looked at the fuses/relays connected to the battery, i located a a/f htr relay. i unplugged it and the pulsing stopped.
so i am getting somewhere. so i wrote down the info on the relay and found one on fleabay. i offered $6 from the $10 buyit now price plus shipping of $5 so hopefully it will cost me $11
does this sound like a relay could be bad?? esp after i disconnected these sensors?