When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hi, is there is a way that I can turn off completely the Taillamp Failure Sensor ? Like cutting a cable or something? I don't really need this sensor! Thanks
LS430 2002
+1000
Im having an issue where the upper trunk lid lights dont come on with the headlights, I have this weird tetris block look going on. (check pic)
Love them otherwise, installed all the resistors but still get the lamp failure message, customer service is responsive so hopefully we can diagnose the issue together.
Im having an issue where the upper trunk lid lights dont come on with the headlights, I have this weird tetris block look going on. (check pic)
Love them otherwise, installed all the resistors but still get the lamp failure message, customer service is responsive so hopefully we can diagnose the issue together.
Yeah bro, this sensor is just unnecessary!
this **** is driving me nuts, EVERYTIME I HIT THE BRAKE ( With lights on) the TailLamp Failure just pop out and make a sound!
I just did the full LED tail light install on my 02 Ultra. My LED's work perfectly and I have no failure's on my dash. To fix the problem with some of them going on and some of them not. Make sure that all of your negative wires (black) from your new housings are connected to the negative (white with black stripe) wire on the old wiring harness that you need to transfer over. The second thing you need to make sure to be careful of is that you didn't pinch any wires when you tighten them down.
I made both of these mistakes and corrected them. I didn't blow any fuses at all but got had the same problems that everyone else did. After correcting a few wires I was golden.
I'm actually not getting my car until tomorrow....but I have never noticed that a LS430 has led brake lamps...does it? The '06 brochure says it does. For me, because I'm purchasing the car out-of-state, I have to inspect it in my own state (PA), and if it has LED lights, I'd want to verify they're working properly (if a bulb I'd just buy a new bulb).... Here's a paste from the '06 brochure...thx
edit: LED taillamps is clearly listed a second time at the end of the brochure, under standard safety and security features. I have never been behind a 3rd gen LS that I've seen it on......
Yes, the brochure is factually correct, each rear light assembly (there are 4) contains LEDs. You can see them in the pic you posted.
Thanks, if I actually had my car, I'd be able to simply have my wife step on the brakes and look! I wouldn't want to get home to PA and discover one is not working, apparently they are $250 ea online....I do remember from the test drive, that the mirror switch didn't initially respond when I pressed it. I'm sure I'll have any/all the common '06 issues....but from everything I understand, this is an overall very reliable car....
Two questions:
1. Where is the "Multiplex Rear Junction Computer?
and
2. How do you increase resistance? Is there a dial you turn?
Thank you.
1) A Celsior has it in the trunk as is indicated by a red arrow.
2) There is not any dial at all. You need to change resistors selecting suitable ones after calculations.
The wattage is also an important factor too. You need to select resistors to meet the power dissipated.
Necro'ing this thread but I found the size of the resistors 6432 Metric. @Yamae thanks for all the info, I hope there's a way to disable the entire failure condition entirely, let me know if you've found anything new!
Last edited by dmarkmd5; Sep 13, 2020 at 06:19 PM.
1) A Celsior has it in the trunk as is indicated by a red arrow.
2) There is not any dial at all. You need to change resistors selecting suitable ones after calculations.
The wattage is also an important factor too. You need to select resistors to meet the power dissipated.
Hey Yamae, how do you take apart the J/B ECU? I have it in front of me and all i see are clips on the edges but no screws or any sense of of a hint of how to take the plastic off the ECU -- I have all the fuses off
EDIT: God sorry, I just had to use 10 different pry tools at the same time to get it past the clips, sorry for the thread bump
Last edited by dmarkmd5; Sep 13, 2020 at 06:02 PM.
Hey Yamae, how do you take apart the J/B ECU? I have it in front of me and all i see are clips on the edges but no screws or any sense of of a hint of how to take the plastic off the ECU -- I have all the fuses off
EDIT: God sorry, I just had to use 10 different pry tools at the same time to get it past the clips, sorry for the thread bump
Dear Yamae, thanks for useful information. I have opened my fuse box. I have two questions; First I couldn't find SMR in such low resistance value. Alternately may I used ordinary I/2 watt resistors?
Second I have tried to fix newer Fuse Box 82670-50080 in my LS 2003 but it is not switching On rear Parking/Dim lights. Any idea?
Last edited by rizwan01; Jul 2, 2021 at 10:06 PM.
Reason: To update the improvement
Dear Yamae, thanks for useful information. I have opened my fuse box. I have two questions; First I couldn't find SMR in such low resistance value. Alternately may I used ordinary I/2 watt resistors?
Second I have tried to fix newer Fuse Box 82670-50080 in my LS 2003 but it is not switching On rear Parking/Dim lights. Any idea?
Sorry that I didn't notice your post for the past 10 weeks. The wattage of the resistor can be calculated in accordance with the current and the resistance. For an example, when you select a LED array which consumes 0.38A (1/10 of the original 2 incandescent 21W bulbs) and you use a 0.2 ohm (10 times of the original) resistor, the dissipating power can be calculated by 0.38 X 0.38 X 0.2 = 0.02888 (ie P = I square R). So a I/2 watt resistors is enough.
Regarding your second question, I have never investigated that area and sorry that I have no idea to answer.
In case of a JDM UCF30 and 31 of earlier models that have conventional bulbs, the failure sensor circuit is in the “Multiplex Rear Junction Computer”.
As is shown in the photo, there are following current sensing resistors and the voltage drop at each resistors are checked by the comparator and the processor.
R81 = 0.1Ω for tail lights (5Wx2) used at the trunk lid.
R89 = 0.1Ω for tail lights (5Wx2) used at the rear fenders.
R82 = 0.02Ω for outer brake lights (21Wx2)
R85 = 0.02Ω for inner brake lights (21Wx2)
R87 = 0.1Ω for tail lights built in outer brake lights (5Wx2)
R83 = 0.1Ω for tail lights built in inner brake lights (5Wx2)
R121 = 0.04Ω for 3rd brake light
Increasing the resistance of these resistors, you will not have the brake light warning.
For an example, use a 0.2Ω instead of a 0.02Ω for a R82, if the current becomes 1/10 when you use the LED brake light for an outer brake lights. If the current is 1/5, use a 0.1Ω.
The new resistor can be calculated easily in accordance with Ohm's law.
Hey buddy ,
I just have the LED Tail Lights installed on my 01 LS430 and i have the same error message "Tail Lamp Failure" . My question is what kind of resistors are these ? I've never seen any resistors like this in your picture.
I just have the LED Tail Lights on my 01 LS430 and i have the same error message "Tail Lamp Failure" . My question is what kind of resistors are these ? I've never seen any resistors like this in your picture.
