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2005-2010 Mustang GT Tech Forum

2011+ Talk | 2011+ GT | 2011+ V6 | 2005-2010 Talk | 2005-2010 GT | 2005-2010 V6 | Shelby GT500 | Mustang Tech 
 

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Unread 01-15-2011   #1 (permalink)
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Default Ignition Switch Wiring Diagram

I’m going INSANE! I can’t find a wiring diagram that encompasses the ignition switch (2007 GT) and where all the wires coming out of it go to, etc. I found a “part” of it in the instrument cluster diagram but that only covers the one wire in the ignition switch plug that effects the cluster (low voltage switched power).

There are other 12v switched “wires” coming out of that connector and I want to tap into the best one to run a few low voltage sources. I just don’t know what powers what (aside from the cluster) and would like to pick the best one.

Anyone know where I can find a wiring schematic of the ignition switch at> I checked the online service manual and for the life of me can’t find it.

Thanks
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Unread 01-15-2011   #2 (permalink)
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Stangstta might know if you don't hear soon...

last thing we need is an insane sqidd!!
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Unread 01-15-2011   #3 (permalink)
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Well, I figured it out. Behind the passenger side kick panel is a small fuse block with three unused receptacles. Two are switched, one is constant. I had to run to three places but I managed to get my hands on one of these without having to order it:
Mini ATM Fuse "ADD-A-CIRCUIT"

And I am soooooooo happy. No tapping into existing circuits/wires for me. That crap scares the he!! out of me. All I have to do now is run the wire about a foot up to where the airbag was and plug it into the distribution block I have set up to run all the crap I need switched.

So if you are looking for switched power for anything that doesn’t have a high amp load (which you should be using a relay for anyway) then everything you need is “pug in play”.
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Unread 01-15-2011   #4 (permalink)
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A bit late now since you’ve already taken care of your problem, but for reference the key switch wiring is located in the Power Distribution-SJB diagram. Third page on the right. Here’s the link:

Ford Service Manuals - Wiring Diagrams
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Unread 01-15-2011   #5 (permalink)
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Quote:
Originally Posted by sqidd View Post
Well, I figured it out. Behind the passenger side kick panel is a small fuse block with three unused receptacles. Two are switched, one is constant. I had to run to three places but I managed to get my hands on one of these without having to order it:
Mini ATM Fuse "ADD-A-CIRCUIT"

And I am soooooooo happy. No tapping into existing circuits/wires for me. That crap scares the he!! out of me. All I have to do now is run the wire about a foot up to where the airbag was and plug it into the distribution block I have set up to run all the crap I need switched.

So if you are looking for switched power for anything that doesn’t have a high amp load (which you should be using a relay for anyway) then everything you need is “pug in play”.
Just be carefull pulling the power from the SJB. The SJB is low current (10 amp max) so don't fuse it any higher than that. The other thing and you may have already found this out; not all the fuse connections (circuits) are hot in the SJB...just because there is an empty place for a fuse doesn't mean there is power there......found that out the hard way.

If your car is a manual, another good place to get switched power and light switch controlled power is from the auto transmission shifter harness in the consol. Even if the car is a manual the plug for the shifter is still there and power can be pulled from it.
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Unread 01-16-2011   #6 (permalink)
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Originally Posted by stars View Post
A bit late now since you’ve already taken care of your problem, but for reference the key switch wiring is located in the Power Distribution-SJB diagram. Third page on the right. Here’s the link:

Ford Service Manuals - Wiring Diagrams
Thanks for posting that up. At least I can find it now.

They sure don't make it easy!
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Unread 01-16-2011   #7 (permalink)
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Originally Posted by 10/05gt View Post
Just be carefull pulling the power from the SJB. The SJB is low current (10 amp max) so don't fuse it any higher than that. The other thing and you may have already found this out; not all the fuse connections (circuits) are hot in the SJB...just because there is an empty place for a fuse doesn't mean there is power there......found that out the hard way.
I'm gonna run 10A fuses for sure. I think I will be good though. Nothing I am wiring in takes much more than a 12v signal.

If your car is a manual, another good place to get switched power and light switch controlled power is from the auto transmission shifter harness in the consol. Even if the car is a manual the plug for the shifter is still there and power can be pulled from it.[/quote]
Niiiiiiiiccceeee! I'll have to store that in the memory banks.
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Unread 01-16-2011   #8 (permalink)
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I'll have to store that in the memory banks.
me too, where I'm sure it'll be lost in a bad sector soon and I'll need data recovery help (i.e. Search function)
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Unread 01-17-2011   #9 (permalink)
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If you've remove all your airbags, have you considered using those wires? They should already be fused and be a switched source. Just a thought, not sure why I didn't think about that earlier when mentioned where you have your controler placed. Must have been having a brain fart that day.
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RWHP/RWTQ is adequate
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Unread 01-18-2011   #10 (permalink)
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If you've remove all your airbags, have you considered using those wires? They should already be fused and be a switched source. Just a thought, not sure why I didn't think about that earlier when mentioned where you have your controler placed. Must have been having a brain fart that day.
That's a good ideer! The plug for the PS airbag is right there where I need to pull power.

Nice!
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Unread 01-20-2011   #11 (permalink)
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Quote:
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That's a good ideer! The plug for the PS airbag is right there where I need to pull power.

Nice!
Won't work. The only time there is 12 volt at the air bag connectors is when the air bag is being deployed. The voltage for the air bag comes from the RCM. (Restraint Control Module) The RCM uses a very low voltage signal to check the components for self test but other than that the wires have no voltage.
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Unread 01-20-2011   #12 (permalink)
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Quote:
Originally Posted by 10/05gt View Post
Won't work. The only time there is 12 volt at the air bag connectors is when the air bag is being deployed. The voltage for the air bag comes from the RCM. (Restraint Control Module) The RCM uses a very low voltage signal to check the components for self test but other than that the wires have no voltage.
I would have thought that it would have a switched voltage as well, kind of an arming mechanism. Learned something new.
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RWHP/RWTQ is adequate
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Unread 01-22-2011   #13 (permalink)
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Won't work. The only time there is 12 volt at the air bag connectors is when the air bag is being deployed. The voltage for the air bag comes from the RCM. (Restraint Control Module) The RCM uses a very low voltage signal to check the components for self test but other than that the wires have no voltage.
Well, back to the fuse block on that side. No biggie.

Thanks for the heads up!
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Unread 01-22-2011   #14 (permalink)
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After looking at the diagrams that you sent I have to agree with 10/05gt. They really dont give any info on on the signals/voltages in their diagrams, just routing. Makes it a pain to find what can be reused for other stuff in cases like yours. I know that with the safety stuff there are a lot of wire that are useless for anything but diag tests. Just adds extra weight in copper and plastic.
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Unread 01-23-2011   #15 (permalink)
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me too, where I'm sure it'll be lost in a bad sector soon and I'll need data recovery help (i.e. Search function)
I know about these bad sectors, I run into a lot of them ... they're called blonde moments, and if unfortunately, the data recovery function was lost in one of these bad sectors, you may be blonde for a long time.
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