importeclipsegst

http://www.tamparacing.com/for....html
^^^^link to diagram^^^^
ok guys i have a wiring issue in my 2000 civic si, it keeps blowing the main ecu fuse and heres what i have gathered so far.....

on the main relay there are 8 terminals

term 1 = white/blk wire
term 2 = black wire
term 3 = yellow/black wire
term 4 = empty
term 5 = yellow/green wire #2
term 6 = blue/white wire(starter)
term 7 = yellow/green wire #1
term 8 = green/yellow wire

evertime i plug up the main relay the fuse underneath the hood blows (fuse 44 15 amp). i can unplug the engine harness on the drivers side and plug in main relay, but as soon as i plug in engine harness it blows. the white/black wire is the power wire and the black is a ground, if i use a jumper wire and connect to blue/white wire the engine turns over as well as the yellow/green wire #1 turns on the fuel pump with the jumper wire. i can also pull the fuse 13(15amp, yellow/green wire) out and plug everything up and the fuse will not blow, but as soon as fuse 13 is inserted in blows the main ecu fuse(fuse 44). i also checked for continuity for yellow/green wire #2 and there are no breaks in the wire. i also ran a seperate ground for the main relay making sure it was grounded correctly and it still blows, also check for voltage using the black wire as main ground and it was ok. i also checked continuity for the white/black wire and also no breaks. the yellow/black wire is the gound for all the injectors i suppose because i also used it to check for voltage as it gave me a good ground. not that it matters, maybe it does, when i disconnect the drivers side harness there is a yellow/green wire there also, but i cannot find where the wires go to. i have copied the wiring diagram above as from the actual service manual from honda, so any/all adivse of suggestions will be appreciated



Modified by importeclipsegst at 1:01 AM 11/7/2006

Archidictus

1.) your picture doesn't work.

2.) when did this start happening?

3.) why did this start happening? What did you change?

4.) What are the labels for the fuses that you cite? 13, specifically. 44 is the Main ECU fuse, I think you said. Get us this info and it'll help us help you.

importeclipsegst

ok fix the pic problem, all help is appreicated

cxSHOE

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by importeclipsegst &raquo;</TD></TR><TR><TD CLASS="quote">ok fix the pic problem, all help is appreicated
</TD></TR></TABLE>

you haven't fixed anything, it goes to another forum which has the same question you have here?

check you pm use it, it may help with this problem

importeclipsegst

hey can u send that again, my comp froze up and i didnt get to open it

EE_Chris

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by importeclipsegst &raquo;</TD></TR><TR><TD CLASS="quote">the yellow/black wire is the gound for all the injectors i suppose because i also used it to check for voltage as it gave me a good ground.</TD></TR></TABLE>

I post straight up scans from the Helms ETM in your other thread and you suppose the Yel/Blk is a ground??

When you put Fuse 13 in (with key on/start), it provided power to the coil which pulls the set of contacts in that provide power (through Fuse 44) to the injectors, etc through....the Yel/Blk wire. Now if you're saying that you used that Yel/Blk wire as a ground to measure voltage on some other wire, we have a problem.

Instead of measuring for opens in a wire, measure for shorts to ground now.

Andres-eh2

its definitely a short in the harness probably grounding itself on the chassis or elsewhere

92redhatch

same thing happened to me. turned out to be and injector wire that was crimped under the fuel rail.

92redhatch

disconnect the engine harness. turn on the car if the fuse blows you know its inside the car if not then you know its in the engine bay. if its in the engine bay then you put a new fuse turn the key on and go connecting plugs in the engine bay one by one until the fuse blows. be sure to check all the plugs. once you find out which plug is blowing the fuse then you just go wire by wire.

importeclipsegst

yea i did disconnect the harness at the drivers side, not the passanger side of the harness, when i unplug the drivers side harness it does not blow, so i will check that, but will just unplugging the injectors see if it is the injectors? ill check as soon as this damn storm passes.

92redhatch

just go plug by plug that way you dont have to guess. Once you find out which plug it is then you have to go wire by wire to see which wire it is.