yikes

SGT BRAD · Post by **SGT BRAD** » Sun Dec 17, 2006 1:42 am

ok i've asked some pretty detailed questions in the past got no responses. this time i really could use some help. i am in the middle of installing a crane hi6di2 with trigger and retard modules. i've also installed an nos progressive controller/window switch/tps, nx wet kit with zex purge, safc, plus gauges, arming switches, etc. it's a nightmare. i paid a local tuner shop to do it and they screwed it up completely. so i had to start over by pulling everything out. i've completed everything but the crane install. but, i've got 2 problems. 1. i need to find a switched 12v source under the hood. all i need is a power on side to a relay, the actual load will be directly from the battery. but, i need to know which lead i can tap from that is keyed on and powered on during start. 2. i am looking at the coilpack and need some clarification as to what each of the 3 wires does. i have one that is grn/blk disappearing into the harness of the car heading towards the main harness and firewall. it's the middle wire and i believe it is the 12v source for the coilpack. then i have the outside 2 wires that run from the pcm to the coilpack. i have a 12v wire that i need to hook up from the crane ignition. i then have 2 coilpack wires to hook up to the ignition and the 2 wires from the pcm hook into the trigger unit. next the trigger unit and crane ignition plug into one another. which wire going into the coil is which? i think it matters to the crane b/c if i get the wires backwards then i think it will fire 180 degrees out of phase. however, since we are a wasted spark system does it matter? please help. thanks.
brad

turbodudey · Post by **turbodudey** » Sun Dec 17, 2006 4:39 am

1. i need to find a switched 12v source under the hood. all i need is a power on side to a relay, the actual load will be directly from the battery. but, i need to know which lead i can tap from that is keyed on and powered on during start.

There are two large connectors on the PCM, and the one that has all the wires from the injectors, coil pack, etc is C1. Here is the pinout:

Pin 20 is switched 12V. It will give you power when the key is on and while cranking.

2. i am looking at the coilpack and need some clarification as to what each of the 3 wires does

Here is the pinout for the coilpack:

Depending on what year your car is, the wire colors may be different, but the functions shown here are the same.

quicksilvr · Post by **quicksilvr** » Sun Dec 17, 2006 11:40 am

For switched 12V, you can also use the fuel pump relay in the PDC. That's where I get mine for my MSD and ZEX switches.

turbodudey · Post by **turbodudey** » Sun Dec 17, 2006 3:39 pm

The FP relay isn't powered when the key is in the ON position and the car is NOT running. It's only powered while cranking and running.

Not sure if that makes any difference for you, but if you need power when the key is in the on position but the car isn't running yet, then the FP relay won't work.

Depending on how you want your setup to work, it may be better to get 12V power from the FP or ASD relays. That would make it so your ignition system wasn't powered until you actually started the car.

quicksilvr · Post by **quicksilvr** » Sun Dec 17, 2006 5:27 pm

turbodudey wrote:The FP relay isn't powered when the key is in the ON position and the car is NOT running. It's only powered while cranking and running.

Not sure if that makes any difference for you, but if you need power when the key is in the on position but the car isn't running yet, then the FP relay won't work.

Depending on how you want your setup to work, it may be better to get 12V power from the FP or ASD relays. That would make it so your ignition system wasn't powered until you actually started the car.

Uh, wrong franky. The fuel pump relay IS powered when the key is on the ON position.

turbodudey · Post by **turbodudey** » Sun Dec 17, 2006 5:56 pm

Actaully it's not.

It will click on for exactly one second when you turn the key to the on position, and then it will click back off untill the PCM recieves signal from the crank sensor and the cam sensor indicating the engine is cranking.

So, essentially you get power when cranking and running. (unless you're counting that one second when you first turn the key on. this is why you hear the fuel pump run for one second when you click the key to ON and then it goes back off.)

Wait a second... you're probably referring to the power TO the relay and I'm referring to the power OUT of the relay. So you're right. The positive side of the relay coil would have power when you turn the key on, but it's only grounded through the PCM for that one second.

quicksilvr · Post by **quicksilvr** » Sun Dec 17, 2006 6:01 pm

Then why do my switches come on and stay on with the key in the on position....even when I'm not cranking.....??? We're just having all kinds of correct information problems these last few days...

turbodudey · Post by **turbodudey** » Sun Dec 17, 2006 6:02 pm

That was a fast replay! ^^^ Look up again. I edited may last relpy.

quicksilvr · Post by **quicksilvr** » Sun Dec 17, 2006 6:04 pm

Hehe, now we're on the same page.

turbodudey · Post by **turbodudey** » Sun Dec 17, 2006 6:07 pm

Right. So Brad has two choices. Depending on which side of the FP relay he hooked up to, he could get switched 12v whenever the key was on, or 12v only when the FP was running (ie. cranking/running)

SGT BRAD · Post by **SGT BRAD** » Sun Dec 17, 2006 6:55 pm

thanks fellas. does anyone know if any of the empty sockets are live during on-crank-run? i've got an sxt and there are a whole mess of unused sockets in the power distribution center, the 2 large spare relays, 1 smaller spare relay, the eatx relay, the mtv relay, and then the abs fuse, 5 spare spots at fuse, eatx fuse, fogbux fuse, mtv fuse and the 2nd abs fuse. all of these are unused. are any of them live during on-crank-run? my crane has to have on-crank-run. if so which side of the relay socket should i pull power from? i would imagine that the power side would be the pcm side of the fuse block. i am asking all of this b/c i have my intake, battery, tray and trans mount are all removed. so i have no way of cranking anything. thanks for the replys.
brad

gski4life · Post by **gski4life** » Sun Dec 17, 2006 6:59 pm

subscribed, so it is a good idea to have a MSD or Crane ignition setup (with manual retard) to go with the nitrous setup......

SGT BRAD · Post by **SGT BRAD** » Sun Dec 17, 2006 7:25 pm

if you're running an afx/r pcm it's a must. plus i'm going with the full n/a stroker so why risk a 7k motor for a 500.00 investment in an ignition with retard.

Loud-e-nuf · Post by **Loud-e-nuf** » Sun Dec 17, 2006 10:08 pm

Not sure if this will help or not, but when I put my Crane in I used the wire going to the center coil pin for my switched 12v. Since the ignition is going to replace that wire with one of it's own it worked fine for me.
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List Of Mazda Platforms
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ZX14 VS HAYABUSA

TomZ · Post by **TomZ** » Sun Dec 17, 2006 10:30 pm

FWIW, the connector on the transaxle of my '02 is switched. I have power to my mag butterflies sourced from there...it's real easy to get to.

SGT BRAD · Post by **SGT BRAD** » Sun Dec 17, 2006 11:25 pm

Loud-e-nuf wrote:Not sure if this will help or not, but when I put my Crane in I used the wire going to the center coil pin for my switched 12v. Since the ignition is going to replace that wire with one of it's own it worked fine for me.

need more info please. i take it that you're using the trigger unit as well. so let me see if i understand your set-up. are you running straight from the battery for the main 12v source? that is the one that i was going to have switched, but if you're running straight from the battery without problems then that's a good solution. i just always worry about running a tap straight from the battery. thanks for the input. also i'm still trying to determine if it makes any difference which way you pull the wires off of the coil and tap them into a and c on the crane plug? thanks again. i really appreciate everyone's help on this one. there have been a couple of times i needed help and got no reply. ya'll came through on this one. thanks.

brad

SGT BRAD · Post by **SGT BRAD** » Tue Dec 19, 2006 9:17 am

i think i have everything figured out now. thanks for the help, especially the pin out diagrams above. found those in my fsm and haynes only after you had posted them. this has been a big help. i'll hopefully finish the install this weekend and post the results.
brad