i mistakenly put a s5 turn signal switch on to my s4 car like a _______, and it made a weird sounds. so I took it out.

obviously my turn signals are not working, but everything is else working fine. including the low and high beam.

i did some research about this problem and some peoplpe said it could be the cpu near the driver's side?

if anyone could enlighten me on what i can do about my problem, i would appreciate it

 

S5 turn signal switches wire up different than S4 ones and are not interchangeable without re-pinning/ rewireing the harness. This is why the correct wiring harness must be used and you can't swap light switch harnesses between series either.

That said, you probably burned up the flasher board in the bottom of the CPU in the drivers kick panel. Replace the flasher board. The 86-96 RX-7 all use the same flasher board as well as all years of the MX-3 if you are hitting up a junk yard looking for one.

 

Mark thank you for your help. I am not too sure what the flasher board looks like. I only see a box of fuses a black box with a bunch of wires going into it and a plug with like 10 wires going into some copper thing

 

The CPU is the black plastic box next to the fuses. The circuit board Icemark mentioned is part of it.

 

ok i pulled out the black box.

now i disassembled the entire thing.

looked at all the boards (btw i am no expert on electronics)

nothing seems to be fried, the compassators look ok i think.

ok i think the flasher board is the board that has 4 prongs.







reliability speaking,
should i just go to the junk yard to replace the board, or get my electrician friend to resoldier any points if possible

thanks in advance

 

.

 

so this must be it

i dont see whats wrong with it

 

*****OK QUICK UPDATE*****

I went out to the junk yard today and i got a new cpu!

i switched out the flasher board

and when i plugged it in, the turn signals still dont work!

i know the flasher board is working cause when i turned the hazards on, I can hear/see the flasher board click with the hazard lights.

can anyone please enlighten me on what i need to do

thanks

 

Got me. The first thing I would have done, is with all plugs connected up, gotten a meter out and found out if I was getting batt voltage at the two wires on the CPU that represent left and right signals being turned on.

The Green/Yellow and Green/Red wires on the CPU plug called F-55. Backprobe the two wires with key to ON and signal to Left and then Right. Seems you'd see batt voltage on the respective wire at the CPU when the signal is to left or right.

It's understood your not seeing the left or right turn light in the instrument cluster when you turn left or right, but see both when in Hazard. If this is not a true statement , you need to say so.

The Hazard part, I Think, works by putting a gnd on the Hazard/Flasher unit, and that part SEEMS to be happening. So, to me, it's the lack of a signal from the maunal switch you use to signal left/right.

 

exactly, why can't i get signal from the turn signal switch?

 

Have you even looked? to see if you do or do not have the signal?

I assumed you checked the fuse. The Hazard uses another fuse than the turn signals. I mean, nobody would write a thread unless they did the minimal checking out of things.

 

im going to admit it, im a ________

i was like what the heck, it would hurt to "recheck" the fuses one more time.

so i went through all of them again, and wah lah, it was a blue 15 fuse.

i went to the store, and got a fuse, popped it in and now it works...

at least i admitting it, but i would like to thank everyone for their help.

i learned a lot about flasher boards i guess, and about good and bad soldering joints. so nothing went to a waste

 

Well. See there in my first post where I said the first thing I would do is check the CPU to see if I was getting a input at from the right/left signal? Seems that was a bit wrong. Should check the fuses first.

The COVER of the interior and engine bay fuse boxes, are shown in the FAQ thread. It shows where the TURN fuse is located.

Like you say, it never hurt to learn a bit more about your car. Personally, I've never taken a CPU apart. I'll learn someday.

There's also the lingering question of why the fuse blew in the first place. Time will tell.

 

i am having a similar problem. my front turn signals work, but the rears dont. the front and rears both light when the hazards are on

 

What car?

At first glance, it seems that cannot be so and you must be delusional. humor

I mean, the wire for the left side of the car supplys the output for the front and rear. So if the hazard is putting out, then both should be flashing. Same with the right side of the car. One wire comes out of the CPU for the right side so both front and rear should flash. On a series four it seems that way. Seemingly.

Does the indicator in the instrument cluster flash when signaling left and flash when signaling right? And do both those instrument cluster lights flash when the hazards are on?

 

its a s4 with s5 turn signals. the cluster lights flash on each side when using the switch and on both sides when using the hazards.

 

When you say series five turn signals.....you mean the lights themselves bolted to the front and rear of the car? and not the switch? No matter how you answer.....I'm lost right now on how that can happen on a series four or series five. Gotta be in the light assys.....somehow Maybe I need to look more at the wiring at the lights on each end of the car instead of looking at that diagram I posted. Later.

 

they are the jdm s5 turn signals, there is only two wires on the back instead of 3 like the usdm ones. i was under the impression the 3rd wire was for the parking lights. i dont think that would matter though? thanks hailers.

 

I don't know. Say we're talking the left side of the car. The GB wire at the front or rear should be the wire that carrys the left turn signal or the left hazards.

On a USA model, the B wire is the ground for the light. But the JDM has but two wires????? No third for gnd?

RB is parking lights for a USA.

JDM have no parking lights? Got me. Also if they do have parking lts and turn signal lights, how would those lights get a gnd? if there is no third gnd wire?

No real answer from me. Never seen 'em before.