Injector Loom Help

[tm_r33]

so i am currently cutting the plugs off my factory injector loom and crimping/attaching new plugs for my id1000s.

im a sparky by trade so have no problems make new connections but im confused on polarity.

my id1000s are polarity sensitive and have + and - marked on the injector head at the corrosponding pins. in my factory loom i need to know if the common grey cable that is shared between all injectors the negative or positive???

is the single wire that is dedicated to each injector positive or negative?

i just cant remember if the injectors work on switched the earth or switching the active.

Edited April 24, 2011 by tm_r33

[tm_r33]

just looking at some wiring diagrams now and it looks to me like the wire that is common between the 6 injectors is the + and the individual wire to each injector is -

(they work by the ecu switching off/on an earth)

????

sound right?

[tm_r33]

so the grey wire is the positive wich is common between all injectors and the coloured wires are earths/negatives that are switched by the ecu?

[JonnoHR31]

yes, they're switched via the earth

[scotty nm35]

I had the same issue with my ID1000's, I asked the injector specialist and he told me not to worry as its just a coil with no reason to suggest a polarity on the plug as either way would energise it. I still wired them up as per the plug though and obviously have no issue.

Im temporarily running the stock turbo at the moment until my GTX comes this week and it idles perfectly on ethanol with the 1000's.

[tm_r33]

yer sweet i wired them up with + in correct position but so hopefully no dramas. i wish they came with a patch loom like my haltech lol.

i hate make looms. im too anal so ive spent 8 hours on it today ( im still going) cause im just not quiet happy with how it looks on top of the motor so i keep changing it lol.

tape.... no tape.

split tubing...... no split tubing.

heat shrink..... no heat shrink.

combination of all of the above...... nar looks shit.

ill keep working away and post some high res pics of loom and loom on motor when im done.

cheers guys

[Jack88]

There is no polarity. Injectors are essentially a small solenoid so it doesnt matter which way you wire them.

[RRob]

Common grey is power supply.

[Turbsxr6]

Thanks mate