Supra Forums banner

1 - 4 of 4 Posts

·
Premium Member
Joined
·
673 Posts
Discussion Starter #1
I was wondering just how many people out there that have older MKIV's (1993 through 1996 ) installed the newer 1998 Taillights?
Also how many of you plan to do the swap? Reason I am asking is because I have done this swap and noticed that when you swap them out and you turn your headlight switch on, the lamp failure sensor triggers the indication lamp in the dash, this is normal because the new style taillights work on a different wattage. In order to correct this, you need to do the resistor swap inside the lamp failure sensor box which then will work like normal when you turn your headlight switch on (no indication lit)
I did a write up on this and will post pictures of it soon. Doesn't cost very much at all to do. Beats having to remove the bulb or buying a new Lamp Failure Sensor(too expensive). The hardest part of doing the swap is finding the resistors. Once the resistors are changed and plugged back in, turn headlight switch back on, indication in dash should be back to normal and not lit and then test it by pulling rear bulb out of socket, indication should light up! Back to normal!!! Works like a charm!
Yes I have the '98 taillights on my '93 Premier Edition Supra and ran into the same problem many months ago and have done the resistor swap and have posted many posts regarding the fix so other's can fix their's. Regarding the resistors, you will have to find an electrical part store/warehouse that sells them. Radio Shack doesn't carry them or any resistor above 5K. Finding them is the hardest part about the swap! . Once you swap them out, the lamp failure indication in the dash returns to normal when you turn your headlight switch on. And you can test the lamp failure sensor by removing one of the bulbs out of it's socket and lamp failure indication should come back on just like normal. The resistors you need is 5.1K and 30K (1/4 Watt Variance is sufficient. I will include a picture on my posts that I made as soon as I get around to remembering to do it in my spare time.Good Luck !!!-----Mike Miller (speedracer)

Yes the resistors are on the topside of the electrical board. Be very careful trying to gently pry the electrical board out of the box without damaging the pins because the electrical pins have to slide out of the plastic retaining box. Once you get the board out of the box flip it over and you will see the resistors mentioned in my post. I still plan on getting my webcam out and snapshots of before and after shots and include them in my post when I can get some free time. The hardest part about the resistor swap is finding the resistors 5.1k and 30k (1/4 Watt variance should be adaquate)
 
J

·
Guest
Joined
·
0 Posts
Somebody did a write up on this same topic about two months ago. Thats when I swapped out the tailights on my 94. BTW one of the resistors (I think it's the 5.1k) just needs to be moved so you only need to buy a 30k. My electrical parts store didn't have a 30k so I used the closest thing they had and it worked (I think it was a 32k).
Still good info
Justin
 

·
TRNSFST
Joined
·
890 Posts
sounds good.

you just reminded me though, I need to take my bulb out:D
 

·
Premium Member
Joined
·
673 Posts
Discussion Starter #4
If you do the search you will find out that I was the one who wrote the post up a couple of months ago. I just wanted to see if those of you that had done the swap and ran into the lamp failure sensor indication problem found the solution from the posts I wrote up. I noticed some people talking about removing the bulb and bypassing the sensor leads etc. but if you want the sensor to work with the new taillights, you need to do the resistor swap.
 
1 - 4 of 4 Posts
Top