wiring gurus quick question.. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

paintkilz · 10-10-2011, 03:09 AM

ok guys my harness had a short in it so I pulled it from the car. it previously shorted out my ecu and i noticed i could wiggle a couple wires and power to the ecu would become intermittent.

so once i pulled it, i started probing for continuity.

WELL i went through all the grounds on the ECU side of the harness. I could trace all sensor grounds and the few ECU grounds to the 2 grounding points on the head(f20 grounds).

that would be correct right?

i assume it is but this is where my question comes in. My ecu ground has no continuity with either of the 2 f20 grounds.

i assume i found my first short? or does it not ground there?

sorry if this is noobish. im trying to do all i can and find out whatever before i posted this.

thanks for your time guys

theboy · 10-10-2011, 06:13 AM

what motor is the harness for? what chassis? Your going to have to provide more information if you want help.

paintkilz · 10-10-2011, 01:03 PM

KAE in an S13

Brok3n_RB25 · 10-11-2011, 10:00 AM

Make sure that when you plug in your harness that the dash connector gets plugged in all the way. That had me chasing ghosts for a long time. I finally realized that the latch that holds the connector together wasn't fully seated and I could wiggle it loose enough to drop power to the ECU. I was so pissed when I found out it was something so simple. Just a side note, if you have no continuity through grounds, then that could definitely be an issue. A short to ground on a strictly ground circuit won't do anything, unless it's intermittent.

10-10-2011, 03:09 AM	#1
paintkilz Zilvia Member Join Date: Apr 2006 Location: des moines iowa Posts: 198 Trader Rating: (0) Feedback Score: 0 reviews	wiring gurus quick question.. ok guys my harness had a short in it so I pulled it from the car. it previously shorted out my ecu and i noticed i could wiggle a couple wires and power to the ecu would become intermittent. so once i pulled it, i started probing for continuity. WELL i went through all the grounds on the ECU side of the harness. I could trace all sensor grounds and the few ECU grounds to the 2 grounding points on the head(f20 grounds). that would be correct right? i assume it is but this is where my question comes in. My ecu ground has no continuity with either of the 2 f20 grounds. i assume i found my first short? or does it not ground there? sorry if this is noobish. im trying to do all i can and find out whatever before i posted this. thanks for your time guys

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10-10-2011, 06:13 AM	#2
theboy Zilvia Addict Join Date: Apr 2010 Location: Chicago Age: 32 Posts: 618 Trader Rating: (10) Feedback Score: 10 reviews	what motor is the harness for? what chassis? Your going to have to provide more information if you want help.

10-10-2011, 01:03 PM	#3
paintkilz Zilvia Member Join Date: Apr 2006 Location: des moines iowa Posts: 198 Trader Rating: (0) Feedback Score: 0 reviews	KAE in an S13

10-11-2011, 10:00 AM	#4
Brok3n_RB25 Join Date: Dec 2009 Location: Northwest Florida Posts: 48 Trader Rating: (0) Feedback Score: 0 reviews	Make sure that when you plug in your harness that the dash connector gets plugged in all the way. That had me chasing ghosts for a long time. I finally realized that the latch that holds the connector together wasn't fully seated and I could wiggle it loose enough to drop power to the ECU. I was so pissed when I found out it was something so simple. Just a side note, if you have no continuity through grounds, then that could definitely be an issue. A short to ground on a strictly ground circuit won't do anything, unless it's intermittent.