Wire colors in 1.6L AFM harness for IAT splice
#1
Junior Member
![](/mt2011/images_td/ranks/supporter1.gif)
Thread Starter
iTrader: (6)
Join Date: Mar 2010
Location: Morgan Hill, CA
Posts: 382
Total Cats: 27
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I've been searching but doing this on the phone sucks.
Does anyone know the color of the two wires in the harness going to the AFM that you need to splice into with the two wires from the GM AIT. I want to do it fairly far back to avoid complications when I have to pull it out and get the car smogged
Does anyone know the color of the two wires in the harness going to the AFM that you need to splice into with the two wires from the GM AIT. I want to do it fairly far back to avoid complications when I have to pull it out and get the car smogged
#3
SadFab CEO
![](/mt2011/images_td/ranks/supporter1.gif)
iTrader: (3)
Join Date: Sep 2012
Location: your mom's house phoenix, AZ
Posts: 4,560
Total Cats: 1,142
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
He did mention wanting to do it as far back in the harness as possible to sneak it through emissions.
ground- black
2O- red
2P- red/green
page 4
http://www.miataforumz.com/1990-200-...ing/90diag.pdf
ground- black
2O- red
2P- red/green
page 4
http://www.miataforumz.com/1990-200-...ing/90diag.pdf
#4
Junior Member
![](/mt2011/images_td/ranks/supporter1.gif)
Thread Starter
iTrader: (6)
Join Date: Mar 2010
Location: Morgan Hill, CA
Posts: 382
Total Cats: 27
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Based on the MS instructions they say to connect pins 1&6 to the GM IAT.
![](https://www.miataturbo.net/attachments/megasquirt-18/148260-wire-colors-1-6l-afm-harness-iat-splice-80-image_d0c5d9029abd33d70debe01266a5b3faa1bf45d9.jpg?dateline=1440867793)
There are 7 connectors on the AFM plug and if I'm reading the wiring diagram it looks like I'd need to connect to Black (1) and Red (6)?
I also noticed that there is what looks like a switch between Black (ground) and Light Green for the fuel pump. Is that going to cause problem if the plug is not connected to the AFM?
![](https://www.miataturbo.net/attachments/megasquirt-18/148260-wire-colors-1-6l-afm-harness-iat-splice-80-image_d0c5d9029abd33d70debe01266a5b3faa1bf45d9.jpg?dateline=1440867793)
There are 7 connectors on the AFM plug and if I'm reading the wiring diagram it looks like I'd need to connect to Black (1) and Red (6)?
I also noticed that there is what looks like a switch between Black (ground) and Light Green for the fuel pump. Is that going to cause problem if the plug is not connected to the AFM?
#5
SadFab CEO
![](/mt2011/images_td/ranks/supporter1.gif)
iTrader: (3)
Join Date: Sep 2012
Location: your mom's house phoenix, AZ
Posts: 4,560
Total Cats: 1,142
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Based on the MS instructions they say to connect pins 1&6 to the GM IAT.
![](https://www.miataturbo.net/attachments/megasquirt-18/148260-wire-colors-1-6l-afm-harness-iat-splice-80-image_d0c5d9029abd33d70debe01266a5b3faa1bf45d9.jpg?dateline=1440867793)
There are 7 connectors on the AFM plug and if I'm reading the wiring diagram it looks like I'd need to connect to Black (1) and Red (6)?
I also noticed that there is what looks like a switch between Black (ground) and Light Green for the fuel pump. Is that going to cause problem if the plug is not connected to the AFM?
![](https://www.miataturbo.net/attachments/megasquirt-18/148260-wire-colors-1-6l-afm-harness-iat-splice-80-image_d0c5d9029abd33d70debe01266a5b3faa1bf45d9.jpg?dateline=1440867793)
There are 7 connectors on the AFM plug and if I'm reading the wiring diagram it looks like I'd need to connect to Black (1) and Red (6)?
I also noticed that there is what looks like a switch between Black (ground) and Light Green for the fuel pump. Is that going to cause problem if the plug is not connected to the AFM?
Fuel pump switch. Yes, youll need to jumper or tie the light green wire into whatever pin on the boomslang harness connector that is controlling your FP. I just connected that to pin to 2P in my boomslang and jumpered it at the AFM conn.
thsi is my wiring diagram I made for my car, notice the bottom right corner area
![](https://cimg7.ibsrv.net/gimg/www.miataturbo.net-vbulletin/1024x777/80_boomslangandconnectionsasbuilt_zpsf69139ab_55ce8715693168ba100a191548735f86e7600c5b_b7dc349ad07d20bd7ea22a1a95d59faa86e5fb64.png)
Thread
Thread Starter
Forum
Replies
Last Post
bigmackloud
Miata parts for sale/trade
19
01-08-2021 11:24 AM