ninetwo

Early production 94 SC300. Hazard switch is plugged in, rear hazards and turn signals work fine. Front cornering lights work, front low beams and high beams work. Bulbs and appropriate fuses are not blown either.

Front turn signals do not turn on, nor do any of the front lights blink with the hazards.. I took the flasher relay 81980-24020 out of a car with working hazards/turn signals, and replaced the same part # out of the 94. This did not fix my problem.
I read through Kahns information regarding this and nothing quite struck me.

Something I'm thinking since the rear turn signals and hazards work, that maybe a harness for the front turn signals or hazards is unplugged or damaged - does anyone know the location of such a harness or split between the two sets of lights. Thank you very much and sorry if my writing is confusing.
Pictured below is the flasher I swapped out.

t2d2

iTrader: (8)

I'm with you on the harness hunch. It's been a long time since I've followed the wiring harness, but I assume it passes through the left wheel well. Have you checked there for tire rubbing damage?

The other thing to check is whether the front turn signals have a shared ground that might be bad.

ninetwo

Got my front turn signals and hazards working :] Adjusted the ground tabs on the bulb plug-ins. Surprisingly both sides needed this, pretty odd to me... Pushed them out a bit and they started making contact with the bulb. Lucky me, no wiring to chase down. Thanks for your ideas t2d2

KahnBB6

iTrader: (5)

I'm glad you were able to find a fix for this by cleaning contacts! Things like this can happen with our cars given their age.

Hang onto both of the OEM 1992-1994 flasher relays you have. There is nothing that directly replaces them from the Toyota parts bin due to their design however with the help of Yamae and some major electrical engineering experimentation by LeX2K we do have a DIY potential solution using a certain Camry flasher relay which has a less beefy but somewhat similar internal design inside of it. It requires the building of a custom adapter harness (not hard at all if you're used to small electrical projects) and if you intend to use LED bulbs he has shown a method to modify the Camry flasher relay for that as well.

The OEM relays, if they ever do go bad, have a decent chance of being repairable. They are a very unconventional design which has no commercially made aftermarket replacement for 1992-1994 SC/Soarers (1995-2000 Soarers use a conventional signal flasher relay design) but the nature of their design was to reduce electrical wear on the internal twin relays and all electrical contacts for extremely long service life.

Toyota designed them this way when they were over-engineering everything especially in their high end models. It was a late 80's and early 90's solution by engineers in an era before lower current drawing LED bulbs became conventional.

(And again, for any 1991-1994 Toyota Soarer owners reading this the same thing applies to your cars. Soarers also switched to conventional turn signal relays for model year 1995 (I think) and the circuit and relay design for 1991-1994 is nearly or totally identical just with a different part number. There may be some slight difference in the 91-94 Soarer flasher relay design due to the digital dash cluster being electrically different but I am not sure about that).


https://www.clublexus.com/forums/per...0-24020-a.html

ninetwo

I read through most of that post last night, interesting stuff. Thanks for the extensive knowledge and the willingness to share Kahn.
I plan to snag some of those Camry relays next time I'm at the junk yard

t2d2

iTrader: (8)

That was a crazy little coincidence. Glad to hear it ended up being an easy fix.