Turn Signal Wiring

I was driving home today.  About half way there, my turn signals quit working.  No click click from under the dash, no flash from the signals, and no flashing indicators on the gauge cluster - Nothing at all.  

I checked the fuse, it was good.  I changed it out with another and it still didn't work.  I then changed out the flasher relay (under the drivers side dash) with a brand new one.  That didn't work either.

What else could it be???  Is there another relay in the engine bay or is there something I am missing?

If it matters, the car is a 1987 and it originally had a ca20e.

start stickin your hand out the window

haha
arent there transistor boxes on the drivers side fender?
check dos

Philipn126I was driving home today.  About half way there, my turn signals quit working.  No click click from under the dash, no flash from the signals, and no flashing indicators on the gauge cluster - Nothing at all.  

I checked the fuse, it was good.  I changed it out with another and it still didn't work.  I then changed out the flasher relay (under the drivers side dash) with a brand new one.  That didn't work either.

What else could it be???  Is there another relay in the engine bay or is there something I am missing?

If it matters, the car is a 1987 and it originally had a ca20e.

Had the same problem with my MK1.  Pull the hazard switch out of the column.  Take it apart, clean everything.  Maybe lightly sand the contact points.  Put it all back together and see what happens.  The turn signal circuit goes through the hazard switch.  Although I heard rumor that MK2s are different.  Try it out.

The MK2 have a combo flasher for the hazard and turn signals.  A few years ago, the relay went out and i replaced it with a regular relay.  The turn signals worked fine but I didn't have any hazards. No big deal.  Now I have nothing.  

I will investigate the stalk/column.

Turn signal assembly?  What does all of that include?

I tore the unit out of the steering column today.  It appears that the brushes for the turn signal switch is worn all the way down.  My bright lights quit working a while ago so I am pretty sure that this booger is the culprit behind them too.  I am going to look for another unit.  Thanks for your help.

Yeah, its super common for the switches to wear out/contacts to get dirty/burned, and can cause all sorts of problems.  I think you can get them from the dealer, otherwise try and find one out of a low mi S12...

wow, I could only imagine the dealer price.

I tried imagining.  They want $250.  JEEZ!  Ebay, here, or maybe a self-fix.

UPDATE!!!!  I took the turn signal/headlight unit out of my B13 Sentra and it bolted right up in the stock spot on my 200sx!!  The auto return for the signals probably won't work but everything else should!  The only thing stopping me is the wiring.  There are 11 wire coming off of the S12 unit and 11 wires coming off of the B13 unit.  Some colors match, some don't.  Being that there are the same amount of wires, its probably just a matter of splicing the correct ones together by using some wiring diagrams/fsm's as a reference.  I am so stoked!!

Interesting... let us know how it goes.  B13's are alot easier to find than S12s these days...

If this works out with wiring it will be great.  Is there a relay in the engine bay for the turn signals?  I cant find that info in my haynes manual.

I am pretty sure that the turn signal unit that bolts to the steering column is the problem behind why my turn signals aren't working, but I just want to confirm that.  I replaced the fuse in the fuse panel, and the flasher relay under the dash.  Are there any other relays or units that could be at fault here?  There are some relays in the engine bay but the text is all faded on them and I cannot tell if one is for the turn signals.  Does anyone know.  

1987 CA20E

Why did you start a second thread on this? Merged to your 1st thread

the only thing else I can think of is the fuseable link in the engine bay. Aside from that possibly the storage switch in the fuse panel.  Is there power getting to the fuse period.  To test that take out the fuse.  Then with a test light put the alligator clip to ground, and with the probe test to where both sides of the fuse connectors go into the fuse.  there should be power on one side, and nothing on the other.

200sxkitcar Interesting... let us know how it goes.  B13's are alot easier to find than S12s these days...

I don't believe there are any other relays, just the flasher/fuse, switch, etc.

My toolbox full of tools are at my father-in-laws.  When I get over there, I am going to comb through it all.  I HATE not having a garage!!

The fuse is getting power.  

On the relay under the dash on the drivers side there are three wires.
Green w/ White stripe
Black
Green w/ Black stripe

None of the three wires have voltage when key is on and when the turn signal is engaged.

Continuity exists between the Black and Green/Black stripe wire when the key is off, on, and turn signal engaged.

If I hook a 12v source to the Green/White stripe wire, the hazards work.
 
I am clueless as to what to do next.

Would someone mind checking their flasher relay for voltage and continuity so I could check it against mine.

Problem is solved!  

A few years ago my turn signal / hazard combo relay went out.  I didn't have the cash for a high dollar relay like that so I opted for just a normal relay to run my turn signals.  Well, just so happens, when you push the hazard light button to "on", your turn signals won't work!!!  My son must have been playing in the car and pushed the button over.  The turn signals work perfectly now!  Kids!!!!  haha  

But for future reference, it does appear that a B13 signal/headlight stalk can be used on the S12.  It just needs to be re-pinned.

Give us details on the re-pinning.

So does the signal/headlight stalk look the same or different? Pics if different. I imagine it definitely looks *newer*, and that's something of an incentive right there to do the re-pinning.

The only difference in the functionality of the units is the auto-cancelling function and wiring harness.  In order to get the cancelling to work, you would probably need to swap the steering wheel hub with the unit but it is not necessary for the operation of the turn signals.  You would just have to manually push/pull the turn signal arm back to the center position.

For the wiring, you would need to match up the corresponding wires because the harnesses are different between the S12 and B13.  The insides/guts of it look identical so splicing a B13 harness onto the S12 column wiring should be fairly straight forward.  

Assuming that this would work, I think that an even close match would be from a S13 style 240SX or a KA hardbody.  

I am going to pick up a 1989 240SX unit tonight and I will post back with more info.  This would be pretty cool for the S12 community if this would work.  I might have bright lights!! haha

Got to dredge this old topic up..

I'm having the same problem. Yesterday my turn signals were working fine, but today... No turn signals or hazard lights. The indicator lights on the dash won't come on, and the exterior lights are not flashing. Everything else is working perfectly. The really strange thing is that they began working again for about 5 minutes, then promptly went dead once again. So.. all the fuses seem fine. I guess it is something to do with the wiring. Maybe it's corroded or something. I'll have to get into the steering column it seems.    :glare:

Anyone learned any wisdom about this issue over the years?

Im having trouble with my hazards, my turn signals work until i flip the hazards on then they go out...does anyone have a clue on what it might be.?