Help... I want to try a wild mod, need wiring advice

[HotRodLincoln]

I recently disabled the O/D OFF button on my shifter and moved it to a dash mounted switch, cause there was an unused switch already on the dash. Now, I want to use the button in the shifter for an engine start button. Does anyone know which wires in the steering column control the starter relay? Or where I can find a schematic for the harness? I'm going to wire a kill switch under the dash, so it will only work once per key rotation. Which wires...???

[gadget73]

First off, what year and model are we talking about here?

[HotRodLincoln]

1999 Crown Victoria LX

[SVT98t]

once the woman gets off the other computer, i can scan the starting system schematics from the Hanes Manual in. I'm going to attempt the start button shortly.

-ryan s.

[SVT98t]

You need what on the left.
The wire running to the switch is YELLOW.
The wire coming out of the switch is WHITE/PINK

I am going to make an starting system schematic sticky in the aero/whale forum because we're transferring everything out of here and sorting it out and making things better.

hope this helps.

-ryan s.

[Merc3517]

relays relays relays and fuses. Make sure you understand the schematics and don't start just putting wires together. Besides I think the OD button is an on off switch so you may need to alter something. I will try to find more schematics and info about both of these circuits when I find some extra time.

[SVT98t]

You need to run wires from the ignition switch up to the shifter.
I just converted my car to switches and push button start. I don't need a key to start my car.

Read some of this:

http://www.grandmarq.net/vb/showthread.php?t=18521&page=10

It shoud be the A4/B4 circuit on the ignition swtich.
If you disconnect the switch, all the pins are labeled. You will need a momentary/spring switch for the starter, or else the starter will stay engaged and you'll be SOL.
All you will need to do is cut the A4 and B4 wires and run them to wherever you want your start engine button. And it will turn over the starter. You'll still have to put the key into "RUN/ON".
You don't need a kill switch.
Everytime you hit the start engine button, the starter will turn, but nothing will happen. The fuel pump isn't on. The computer is off. No spark will happen. Unless your key in in "ON". You don't need a kill switch.
You will be able to turn the key to "START", but nothing will happen, because of the start engine button.
The ignition switch is on the bottom side of the steering column.
I recommened ATLEAST 10 GUAGE wires to extend everything. There's a whole lot of current running through those things.

Any questions, just ask.

-ryan s.

[zoomie]

yeah 10 gauge minimum and non of that cheapy wallyworld stuff either ive seen it start to many fires

[Merc3517]

How are you going to run 10 gauge wires through the shifter stalk and the OD button isn't going to handle it. Thus why I stated the importance of relays and fuses. That way you don't need to extend any heavy wire. Just run the proper smaller ones to the proper relay and fuse your power wire for the relay and use the OD button to ground the relay. Much simpler and safer than extending 10 gauge wires to a switch that won't handle it. Just my opinion.

[Mercracer]

I recommened ATLEAST 10 GUAGE wires to extend everything. There's a whole lot of current running through those things..

There isn't THAT much.... Seriously guys... "At least" 10ga? What do you wire your car with.. 4GA cable? :err:
You are not really extending anything (you do not have to anyway..). You can splice in under the dash. It would be silly to splice in at the solenoid and have 2 sets of wires running back and forth.
The point about the switch not being able to handle the current is valid. You would need to run a second relay under your dash or wherever you wish to place it. If you place it in your engine compartment, then your "heavy" wire would be much shorter. If you use a hot wire directly from the battery or hot side of the solenoid, etc, then you could wire a second button in the engine compartment for bumping your engine over for setting rockers, etc..

[Merc3517]

This is very simple. Use a relay that matches the fuse even a little over wouldn't hurt because it won't pull it normally but if it did you are protected with the fuse already there. This should allow you to do what you want and you won't even need a fuse unless you wire 86 terminal to it's own power (which I would do anyway) then you can use some ohms law and a meter to figure out what fuse you need.

[87gtVIC]

Your relay looks funny.

[Mercracer]

Your relay looks funny.

Not if you want the starter to engage any time the transmission is in either neutral or park....

[87gtVIC]

No. I was just rudely criticizing the drawing of a relay. Normally pin 30 is vertical and pin 87a horizontal.

[Mercracer]

Never mind, there is a switch... Was that there before?