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PostPosted: April 17, 2008, 7:50 pm 
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So I am using the stock steering column and I would like to use the stock turn signal with light switch. I have printed out the diagram and have figured out that for the turn signals it goes:

Blk/Yel : 12v source
Grn/Yel: Driver or pass signal (can't remember)
Grn/Red: Driver or pass signal (can't remember)

OK....

So on the rest of the harness I have:
Red/Blue
Red/White
White/Blk
Red/Blk
Blue/Yel
Light Green
Blk

I was thinking that I could feed 12v to one of them as the imput wire then have it put out 12v when I switched parking lights,driving lights, highbeam.

I CAN'T FIGURE IT OUT THOUGH! I have tried everything. Someone help! Keith.

Maybe my problem is I can't use the switch like that? I will then have the 12v outputs run to 3 separate relay's.

1. Parking Light
2. Low beam
3. High Beam


HELP ME WITH THIS HARNESS!


J. R.


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PostPosted: April 17, 2008, 8:45 pm 
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You really must have a factory service manual to do wiring. Asking is okay, but if you have the manual it explains all the colored wires. I'd give answeres if I knew them, sorry.

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PostPosted: April 17, 2008, 8:49 pm 
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I have the wiring diagram print out from:

http://www.madracki.com/miata/wiring.html

But I can't understand it. Look at Fig. 4 for a 1991 on the left side at column letter 'D'

J. R.

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PostPosted: April 17, 2008, 9:12 pm 
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Location: Austin, Tx
Because I'm lazy, I wont look up what your using just ask.

Whats the year of the donor? I have a 92 and 2000 factory wiring manual. I can scan the page you need and email. I have yet to figure out how to make that stupid copier/scanner at work email me more than 1 sheet at a time.


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PostPosted: April 17, 2008, 9:15 pm 
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I don't understand what you are wanting to do. If you want something to be supplied with 12 volts when the light switch is engaged then you could easily tap into the circuit the taillights, marker lights, and parking lights is on. It's the red/blk wire and you could tap into it where it comes out of the fusebox if you like.

When you turn the switch to the first position (parking lights) it energizes red/blk, the next position I believe energizes red/wht.

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Last edited by chetcpo on April 17, 2008, 9:20 pm, edited 1 time in total.

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PostPosted: April 17, 2008, 9:20 pm 
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chetcpo wrote:
I don't understand what you are wanting to do. If you want something to be supplied with 12 volts when the light switch is engaged then you could easily tap into the circuit the taillights, marker lights, and parking lights is on. It's the red/blk wire and you could tap into it where it comes out of the fusebox if you like.


I don't have the fuse box. I never had a miata donor. What I do have is a miata steering column with the stock wiring harness coming out of the steering wheel.

From the diagram what is PAS? Or TNS? or Head

J. R.

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PostPosted: April 17, 2008, 9:23 pm 
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Been staring at it some more. It looks like maybe each switch is wired separate. Whatever the PAS switch is it comes in on red/blue and the switch cloeses the loop and leaves on Blk/Yel

Same deal with the next picture down... In on WHT/BLK and exits on Red/BLK

Am I reading this right?

Maybe those are the high and low beams....then what is the parking lights?

J. R.

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PostPosted: April 17, 2008, 9:46 pm 
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junior wrote:
Been staring at it some more. It looks like maybe each switch is wired separate. Whatever the PAS switch is it comes in on red/blue and the switch cloeses the loop and leaves on Blk/Yel

Same deal with the next picture down... In on WHT/BLK and exits on Red/BLK

Am I reading this right?

Maybe those are the high and low beams....then what is the parking lights?

J. R.


Parking lights are red/blk

FWIW the red/blue and blue/yellow both go to the headlight relay.

Edit-Oh nevermind, I see this is all on the diagram lol.

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PostPosted: April 17, 2008, 10:11 pm 
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Junior, perhaps the confusing thing is that some of the circuits are on different fuses. So there are multiple +12v coming into the column?

If you want to you could connect the +12v wires together, but it might make sense to use different fuses. If you use relays you wouldn't have to worry about the size of the wires. My recollection of the wires was they were pretty big.

Be patient and keep looking at your wiring diagram., You don't want the car to catch on fire.

A cheap meter for resistance will help decode the switch for you. It just takes patience.

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PostPosted: April 17, 2008, 10:16 pm 
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Bottom switch and the one above it are ganged to move together.

The bottom switch in the TNS and HEAD positions, grounds the TNS relay through the lt grn wire, cutting the TNS relay on, powering the marker/parking lights.

The upper switch grounds blue/yellow in the HEAD position, cutting on the HD LT relay.

The switch above that is the hi/lo switch.

The switch above that is the flash to pass switch.

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PostPosted: April 17, 2008, 10:44 pm 
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OOOOOO BOYS WE GOT IT. The Chet and I talked it out on the phone and we got it...........well he really did most of it!

The way the miata is wired is STUPID, but who cares, it works.

J. R.

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