Giving up on ignition switches, Need wiring diagram, Bought a universal starter/ignition switch.. Options

[Andyrew]

So my 3rd replacement ignition switch started tweeking out on me. Im tired of this. This is not a stock 914 so I decided to get an aftermarket switch. 10 bucks at Autozone and I have a switch that I doubt i will ever break.

So I pull the wiring which I have become so familar with and see that there are 6 prongs on it. One obviously ground(Black), One obviously power(red, thick), One keyed power (red, thinner), and one obviously starter(yellow).. But then I see 2 other small wires, a white, and a white/brown. Where do these suckers go? There is no accessory switch to the 914 so I doubt anything can go there, Are they the wires that are keyed power or say a relay? How do I wire this on a 4 prong switch??? I would think that the two smaller wires just go on keyed power, but I'd hate to do it and be wrong.


Thoughts?

Thanks all.

[tradisrad]

go here and find your year and wiring diagram.
Ground is usually brown.

[Andyrew]

I know its usually brown, but its obiously not in this case as there is no brown. Unless the starter ignition switch doesnt use a ground.


I was looking at the diagrams, but cant find "ignition" or similar anywhere on it. I've been looking at them for the past hour... Year is 73.

[r_towle]

#26 on diagram two, "steering column switch"

If you have a 73, the logic circuit is under the passenger seat, or you need to at least look at that part of the diagram to account for the yellow wire.

Rich

[NORD]

In the center tunnel there is a wire, don't remember color,To the starter trace to under

dash, cut and install push button start. Use key for power and push

button for starter. This solved all my problems many years ago. I

even installed Hot Start Relay (IMG:style_emoticons/default/driving.gif)

[Mike Bellis]

The black wire is the ignition hot lead. the 2 small ones are most likely the key buzzer.

[Andyrew]

#26 on diagram two, "steering column switch"

If you have a 73, the logic circuit is under the passenger seat, or you need to at least look at that part of the diagram to account for the yellow wire.

Rich

I saw 26 but there are to many wires on that diagram to make any sense.. Im looking at it now and see black, red, grey, red yellow in one small switch section on 26.. Which makes sense. But I dont see where the other 2 wires come into play...


I ran an ohm meter to all the wires to ground and black, yellow, small red and they all showed continuous to ground, which worries me. The 2 little wires and power didnt show continuous to ground.


So I am a little stumped, I thought I had it figured out till the point I checked ohm to all the wires..

[Andyrew]

OK so lets put this down.

NEW SWITCH -------- 914
Battery :: Thick Red
Ignition :: Black, Thin red
Accessory ::
Starter :: Yellow

[Mike Bellis]

I saw 26 but there are to many wires on that diagram to make any sense.. Im looking at it now and see black, red, grey, red yellow in one small switch section on 26.. Which makes sense. But I dont see where the other 2 wires come into play...


I ran an ohm meter to all the wires to ground and black, yellow, small red and they all showed continuous to ground, which worries me. The 2 little wires and power didnt show continuous to ground.


So I am a little stumped, I thought I had it figured out till the point I checked ohm to all the wires..

You cannot ohm out a complete circuit. By that I mean; The yellow wire goes to the starter, through the solenoid which is grounded. Same with the coil and so on. You need to open the connection at each device in order not to read ground. You will be fine.
Red= power into switch
red= switched power on
Black= switched ignition power
Yellow=starter

Really all you need. You are thinking too hard...

[Mike Bellis]

OK so lets put this down.

NEW SWITCH -------- 914
Battery :: Thick Red
Ignition :: Black, Thin red
Accessory ::
Starter :: Yellow

No real Accessory position on old German cars. The thin red is power to the headlights and stuff. Black is power to fuse 7 and coil.

[chrispy]

Doesn't one wire go from the switch to the headlight relay?

[Andyrew]

OK so lets put this down.

NEW SWITCH -------- 914
Battery :: Thick Red
Ignition :: Black, Thin red
Accessory ::
Starter :: Yellow

No real Accessory position on old German cars. The thin red is power to the headlights and stuff. Black is power to fuse 7 and coil.

So what your saying is im right? (IMG:style_emoticons/default/wacko.gif)

I just tested it and it seems right.

[Mike Bellis]

So what your saying is im right? (IMG:style_emoticons/default/wacko.gif)

I just tested it and it seems right.

Yep (IMG:style_emoticons/default/beerchug.gif)

[914Mike]

So my 3rd replacement ignition switch started tweeking out on me. Im tired of this. This is not a stock 914 so I decided to get an aftermarket switch. 10 bucks at Autozone and I have a switch that I doubt i will ever break.

So I pull the wiring which I have become so familar with and see that there are 6 prongs on it. One obviously ground(Black), One obviously power(red, thick), One keyed power (red, thinner), and one obviously starter(yellow).. But then I see 2 other small wires, a white, and a white/brown. Where do these suckers go? There is no accessory switch to the 914 so I doubt anything can go there, Are they the wires that are keyed power or say a relay? How do I wire this on a 4 prong switch??? I would think that the two smaller wires just go on keyed power, but I'd hate to do it and be wrong.


Thoughts?

Thanks all.

Better to leave the small ones off. Hopefully you have not blown anything up yet.

Heavy Red is Battery IN, smaller Red looks like ACCY power OUT (to 15 on the light switch).

Black is 15, ignition OUT.

The others are most likely the buzzer contacts and the power for the parking lights. Remember, the one-side parking light only works when the key is OFF. That would be a gray wire. A contact that supplies power when you turn the key off is not something a generic switch is going to give you.

Man, the '73 diagram is the most F'd up of all the 914 diagrams! Steering column switch indeed. It has the turn signals and wiper switch AND ignition all in there, it's no wonder they went with the current flow type diagrams in '74! Both the '71 and '74 diagrams are easier to follow...

[Andyrew]

MMMMkay... On my testing zone I had the little red wire hooked up to the accessory position, the black wire to ignition and yellow to starter.. Then I put the little red wire to ignition with the black wire and bolted it all in.. Now the starter is kicking when i turn the key to the ON position....


I am stumped. I am going to put the red wire to the ACC position again and see what happens. when I bolt it up..

[Andyrew]

So I disconnected the yellow wire and tried the key again, no starter kicking over so I verified that the yellow wire is starter... Now im really pissed off. This lovely little ignition switch is now being a piece of crap on me... Im going to move the red wire to accessory and see what that does. I dont see WHY it should do ANYTHING...

[Andyrew]

WTF

I disconnect the switch and check it out. Looks great, functions VIA the ohm meter as normal.

THEN I check the ohm of the hot wire... (battery disconnected) it states its hitting ground..

AHHHHHHHHH I am SO pissed. I cant think straight. So im thinking frayed wire, bla bla bla, Somehow I think the wire must have frayed when I moved it 6" carefully....

This is NOT what I want right now and I have no clue where to start.

Did I mention I am pissed?

[messix]

its not hitting "ground" its conducting thru the battery to the neg that is connected to grnd. thats ok. your talk the big red right?

did you dx the batt with the neg or the pos

[jcd914]

It sounds like you are trying to connect the aftermarket switch up correctly.

If you look at 26 on the diagram the middle 5 terminal are the ignition/start switch.
15 - 2 black wire is ignition power out
1 of the wires goes to the fuse panel (fuse 9) and then to the eng comp fuse/relay panel
1 of the wires goes to the logic relay under the passenger seat
X - Red wire is accessory power out
P - Gray wire is power out with key off
30 - Big Red wire is power in from the battery
50 - Big yellow is starter power out

As the key is turned first power is cut off from the gray wire then when the key reaches the "on" position power is supplied to both the 15 and X terminals.
As the key is turned past "on" to the "start" position power is cut off from the X terminal to reduce the electrical load so more power is available to the starter and ignition.

If you are eating up stock switches maybe you need to put relays on the accessory circuit or check to make sure you do not have excess load tied to the ignition circuit. Often extras (stereo, amps, fog lights, etc) get connected to the first switched power found. There could be more load on the switch than is can handle.

Good Luck
Jim

[Andyrew]

its not hitting "ground" its conducting thru the battery to the neg that is connected to grnd. thats ok. your talk the big red right?

did you dx the batt with the neg or the pos

Disconnected the battery at the negative terminal. I am talking about the big red cable, I dont see how it would hold Ohms with ground if the battery is not connected to ground. IMHO I see that as a short.