165 - Tail Light Problem

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165 - Tail Light Problem

Postby MisterKrazee » Sun Jan 22, 2012 7:00 pm

Yesterday I bought a 165 with a JDM 3S-GTE swap from a 92 MR2. It's having issues with the tail lights not working. I have gotten the STOP lights working. The white power wire going under the fuse box in the engine bay was unplugged. This thread helped with that problem... http://www.alltrac.net/phpBB2/viewtopic.php?f=21&t=30356&hilit=brake+lights
I've gone through several other threads on here and have come to a point where I'm not sure what to try next.

Per this thread... http://www.alltrac.net/phpBB2/viewtopic.php?f=22&t=6328&p=57142
When I jump the two 15 amp fuses my corner, guage and license plates light up constantly. Even when the key is not in the ignition. This definitely is an issue. The headlights function as well, this may be normal, not sure.

I have also tried jumping the tail light relay according to that thread with no progress.

All fuses and bulbs appear to be good.

The yellow lamp failure box has "bad" written on it. I'm not sure what the deal with that is or if it is actually bad and contributing to the problem.

Any help would be much appreciated.
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'88 ST165 ~ Swapped JDM '92 3S-GTE
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Re: 165 - Tail Light Problem

Postby Dracov » Tue Jan 24, 2012 7:53 pm

If the yellow box is hosed that could explain the behavior. They are susceptible to water damage because of their location. Mine goes wonky after it's been raining heavily but it clears up after everything dries off. Try to see if you can get a known working replacement
1988 Toyota Celica Alltrac
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Re: 165 - Tail Light Problem

Postby MisterKrazee » Wed Jan 25, 2012 1:25 am

That's pretty much the last thing I have to check before I start digging into the fuse box/wiring harness. I found some info on bypassing it that I will try for testing tomorrow. If that ends up working I'll source a replacement. I'm ready to get this thing back on the road. Fingers crossed!
'88 ST165 ~ Swapped JDM '92 3S-GTE
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Re: 165 - Tail Light Problem

Postby 88gt4DE » Thu Jan 26, 2012 6:01 pm

Looking at the wiring diagram ... power comes into light failure relay at terminal 10 which is green. comes out of light failure relay and goes to lamps on the light green wire terminal 4 . Vehicles that did not have the failure relay , this wire is connected. Hope this helps is yer efforts. If ya cant find a relay quickly you can prol run a fused jumper in between those wires and it will work for ya temp.... 8)
Rob
1988 ST165 - 77K - Project ---> http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=31483&start=240
2000 Toyota Tundra SR5 - 162K - DD - Thanks 97JZA80
2007 Toyota Rav4 - 110K - My girls DD
1999 Honda Civic - 116K - Highway Runner
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Re: 165 - Tail Light Problem

Postby MisterKrazee » Mon Jan 30, 2012 3:13 pm

I tried bypassing the Light Failure sensor with no luck. At first neither the STOP lights or tail lights were working. After scratching my head a bit and looking through the BGB again I realized it was a female plug and I was counting the pins wrong. :bangshead:

It was a little frustrating looking up how to bypass the Light Failure Sensor. Most info I found was for Supra's and Camry's. Apparently some of them use the same exact sensor, but the wire colors are different than the AllTracs. I finally found which pins supposedly needed to be jumped together.

Jump 4 and 10 together.
Jump 7 and 1 together.

At that point I had STOP lights, but still no tail or corner lights. So, either I still have the pins wrong or my problem lies elsewhere.
'88 ST165 ~ Swapped JDM '92 3S-GTE
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Re: 165 - Tail Light Problem

Postby MisterKrazee » Tue Jan 31, 2012 12:25 am

Okay, so I have good news and bad news. The good news is that those are the correct pins to jump to bypass the Light Failure Sensor. The bad news is that I still have a problem.

It appears I have a power issue in the driver side kick fuse box. After bypassing the Light Failure Sensor, I jumped the 15 amp Stop and Tail fuses according to the thread I linked to in my first post. At this point all lights worked, including the tail lights. Although they are still on constantly.

Any ideas as to why this would be?
'88 ST165 ~ Swapped JDM '92 3S-GTE
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Re: 165 - Tail Light Problem

Postby MisterKrazee » Wed Feb 01, 2012 2:20 am

Made a little more troubleshooting progress tonight. I began checking voltages at the fuse box starting with the tail light relay. The multimeter I was using is kind of crappy so I can't give exact voltages, but I can compare it to what I measure from the battery and know if I'm getting full voltage or not.

With my light switch turned off I get full voltage on the fuse box when I measure the top two connectors taht the tail light relay plugs in to. I get no voltage on the bottom two. I would think this is normal.

With my light switch turned on I get full voltage across the top two connectors still, but only half voltage on the bottom right connector. Is this correct, or am I supposed to be getting full voltage here as well?

With the light switch turned on and a new relay plugged in I do not get any voltage at the tail light fuse. If the voltages going to the relay are correct, I'm assuming the connection between the relay and the fuse is bad. Is this connection made by a wire behind the fuse box or just a connection within the fuse box?

My fuse box is held in pretty tight by the wiring harnesses so I would rather not try to get behind it or inside it to check the connection. I feel this could end up creating even more problems moving the old wires around. I have no problem building a small wiring harness utilizing the working connectors on the fuse box, while relocating the tail light relay and tail light fuse off of the fuse box thus bypassing the bad connection. Although keeping everything as stock as possible is preferred.

I guess the main information I need is if I'm getting the correct voltages at the tail light relay. Any other input is appreciated as well.
'88 ST165 ~ Swapped JDM '92 3S-GTE
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Re: 165 - Tail Light Problem

Postby 88gt4DE » Sun Aug 12, 2012 6:17 pm

For whatever reason I missed this last post ... any resolution to the voltage problems ?
Rob
1988 ST165 - 77K - Project ---> http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=31483&start=240
2000 Toyota Tundra SR5 - 162K - DD - Thanks 97JZA80
2007 Toyota Rav4 - 110K - My girls DD
1999 Honda Civic - 116K - Highway Runner
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Re: 165 - Tail Light Problem

Postby MisterKrazee » Thu Aug 16, 2012 2:52 pm

I wasn't able to find a solution to the voltage problem, but I was able to get the lights working so I'm street legal. I ended up using connectors and wires to basically bring the tail light relay off of the fuse box. It is still wired through the proper fuse. Since I don't have fog lights i wired the switch into the 12v switched side of the relay. I just have to remember to flip that switch whenever I turn my headlights on, which isn't too difficult since the gauge lights are in the same circuit.
'88 ST165 ~ Swapped JDM '92 3S-GTE
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Re: 165 - Tail Light Problem

Postby 88gt4DE » Fri Aug 17, 2012 12:03 am

Good you found the issue though and ran a correction that is fuse also ... I think mine little relay is starting to screw up. If I have the lights on and turn the turn signals on the lights in my HVAC panel start flashing with it ... or they get brighter if I hit the brake. Had the classic water leak in the left quarter glass so I'm sure it screwed that thing up ... It been a few years since the leak and it still does it ... oh well ... :shrug:
Rob
1988 ST165 - 77K - Project ---> http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=31483&start=240
2000 Toyota Tundra SR5 - 162K - DD - Thanks 97JZA80
2007 Toyota Rav4 - 110K - My girls DD
1999 Honda Civic - 116K - Highway Runner
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