Riggs

I haven't had time to check ALL the fuses that could possibly be contributing to this, but the issue is that my blinkers and highbeams have stopped working.

No interior clicks, nothing. low beams work just fine. i cannot switch to high beams, no lights blink at all when I use the signal switch. not inside, not outside. Signal fuse is intact, oh and the hazards work just fine, as do the tail lights and brake lights.

I have seen a few threads concerning turn signals not working, but nothing specific to my car's symptoms... any thoughts?
I'm wondering if the switch itself could be bad.

EDIT: 69th post!!! yeee! lol

Bamato

iTrader: (6)

Sounds to me like the switch is bad if two separate components controlled by one mechanism aren't functioning. Did you verify the harness is connected to the switch?

satch

iTrader: (1)

Located towards the bottom of the CPU is a plug that has about 7 wires. When turn signals are set to left turn the Green/Red wire in this plug should have voltage w/key to on. The Green/Yellow wire , same plug, has voltage w/turn signals set to right turn and key to on. If this does not occur then the switch is likely the cause. You must also check the 15 amp Turn fuse first.

The dimmer switch places a ground on its White wire to activate the dimmer relay. This relay is located at the front of the radiator. It has the following wires; Two Red/Green wires, Red/Black, Red/White and a White wire. W/the lights on low beam jumper a ground to the White wire in this relay plug to see if the high beams come on. If they do you know the high beam filaments are good, the relay is receiving necessary voltage and the relay works properly. Only problem in this case though is the switch in the dash is damaged.

Riggs

Ah yes, I did verify that the harness was plugged in.

I may have another switch laying around... I'll have to test it out. Maybe I'll just see if I can crack open the switch currently in use and check solder points, etc.

satch

iTrader: (1)

The info I offered was for an S4 and not an S5. But in looking at the S5 schematic the fuses and wiring colors for the S4 info is the same for the S5.

jrwaters1

I havr a 91 convertible and fixed a similar problem last week I had to replace the cpu. I got one from Mazdatrix for a little less than 100 dollars. A lot of people have had problems with these and no one recomends that you try to rebuild them.
Jack

Riggs

Swapped the CPU and switch. No help. Fuses are good. Maybe its something in the cluster?? I'm totally lost now.

satch

iTrader: (1)

Did you check anything mentioned in post #3?

Riggs

I will shortly. post the results asap.

Riggs

grounded the white wire, filaments are good. the new switch and cpu didnt help, obviously, but I'm going to swap out all three of the front relays and see where that takes me. Could this all be a problem somewhere along the wiring?? Just found out I need a new multimeter so I cant measure the left and right blinker wires right now.

satch

iTrader: (1)

The job of the Dimmer switch in the dash is to pass a ground to the White wire at the Dimmer Relay. If manually placing a ground on the White wire caused the brights to come on then the relay is good. The problem then comes from why is the wire not being given a ground by the Dimmer switch in the dash. So the switch or the Black wire at this switch which provides a ground is loose. Besides a loose connection between the Dimmer switch and Dimmer relay, the only other likely cause could come from an S5 which has the air bag option for it changes the wiring a bit. Replacing the relays at the front of the car that you speak of will not fix your high beam problem.

Riggs

hm. I dont have an airbag. ill have to wait till morning and chase down the black ground wire.

And my main issue is the blinkers really. i can drive day to day without highbeams but not blinkers. lol.

satch

iTrader: (1)

Regarding the blinkers, you won't be able to do much til then w/o a multimeter. The Dimmer switch has an electrical pug w/9 wires. One of these wires is Red/Yellow. This wire connects to the White wire at the Dimmer Relay. W/the lights on and a ground placed on the Red/Yellow wire the brights should come on. If they do then the connection between the R/Y wire and the White wire is a good one. Also, the Black wire responsible for placing its ground signal onto the R/Y wire is found in the same plug. If placing a ground on the R/Y wire causes the brights to come on w/the lights on then perhaps in addition also placing a jumper wire from the Black wire to the Red/Yellow wire in the same plug w/lights to on and see if the brights turn on. If they do then you also know the Black wire is properly grounded and the problem then lies within just the Dimmer switch itself.

Riggs

Thanks satch. You've been a wealth of info!!

Drove my car around this weekend, to find that my headlights brighten as my RPMs rise... I have a 140A alternator, why would this happen?? I'm wondering if this blinker/highbeam crap is just from needing to redo all my grounds... =(

Riggs

So here's the deal... pulled the switch, friend tested it with my multimeter (thank god cause I picked up a lot of tips and tricks on electrical testing) and found out the switch itself was good. Then he used a jumper cable and started pokin around to find the wire that supplied the switch with power, then figured out which wires are connected to it to activate the blinkers. Took a few minutes but it turned out that directly connecting these points made everything work perfectly. We thought, and scratched. And cursed. We were about to say **** it when I found the switch that came with the car that I swapped out because the mounting tabs werent exactly there. After a short examination of that switch and the one in use, we realized that the two were very slightly different, only in where the harness plugs into the back. Tried the original switch, and *ding* **** worked.

Moral of story: Dogs run fast.

Oh, and S4 turn signal/highbeam switches work, at least TEMPORARILY, in S5 cars. Go figure...