MF-Brain

iTrader: (1)

oldie but goodie.

launch should be set to js10.

correct about ebc. one wire, MS provides the PWM ground on the IAC1B output position. solenoid should be wired to a switched 12v source and the MS ground.

TPS stuff does not apply to a 90-93 that has no linear TPS.



came with a parallel harness?

RedTurboMiata

i have a bmw linear tps, how do i use that with this setup. and it does have a parallel harness. so if i am correct ebc can connect to to the little blue caped connection on the car, and to the ms connection for ground.
did you build the harness, if so what wires am i looking for to do this the correct way.

RedTurboMiata

forgot to mention that i want to wire launch control to a separate switch.

MF-Brain

iTrader: (1)

yes i built it.

do you have the center connector pigtail that fit into that middle plug? can you read any of the labeling? i only see knock on the one input.

the clutch input is the blu/wht wire that's opposite of the red wire coming off 1B. so position 1V.

EBC is one of the green wires on the middle connector.


tps goes back to that blue one, there should be a gray one labeled 5vref, is that on the harness?

RedTurboMiata

i dont have the plug for the center. if needed i will go up to radioshack or something and get a molex connector for it.

RedTurboMiata

there are 5 wires on the center in this order from left to right purple, space,pink,space,green,drk blue,space, drk green and white,

RedTurboMiata

also forgot to ask about wideband input

MF-Brain

iTrader: (1)

The colors mean little, I need to know back to what pin they go back to the db37 connector.

But from what I can tell:

Purple was for a knocksenseMS input. JS10.

O2 goes to that pink wire.

Unsure on green.

solid blue should be the TPS input

green white unsure.


I'm also looking for a gray wire labled rvref, but I'm going to take an educated guess, and assuming solid green is 5vref and the green/white is the EBC out.

I can only confirm this when you tell me what pin they go back to the DB37 connector on.


It's probably easiest for you to just cut all those wires off the yellow connector at this point and run your own connections to them. Jus tmake they they can be disconnected without cutitng if you ever need to remove the harness. Its a shame you didnt get the pigtail with it.


So to run TPS, you'd need to extend the blue and green wires to the engine and hook it up to those properly, you can use the oem ground in the stock tps harness.

launch control you can cut off the harness and wire to your switch. I'd probably want the clutch switch AND momentary switch, so I'd splice the swtich into the blue/wht wire I pointed out, but leave it ocnnected to the actual clutch switch on the patch harness.

RedTurboMiata

hey theres a thick grey wire connected to wiring harness but not the db37 ?

MF-Brain

iTrader: (1)

it better be... that's one of the CAS signals. That's not the one I'm tlaking baout and from teh pic it looks fine...but it should run back to the db37.