1988+ Ninja EX250 FULL Wiring Diagram here!

jonthechron · January 15th, 2010, 02:33 PM

I have just edited a wiring diagram for the 1988+ Ninja EX250. I have made this diagram easier to follow and added some detail.

This is version: US 0.3 (my version of the diagram)
As you can tell it's still in its very early stages as cannot be compared to my newer diagram for the 2008+ 250r, in terms on quality, posted here.

http://www.ninjette.org/forums/showthread.php?t=35886

Eventually, I will update this diagram to make it as best I can for you folks who need to troubleshoot or mod your bikes.

If you have ANY requests or suggestions, please leave a comment here and I will look into them and possibly update the diagram.

Here is a link to the diagram.

nate-bama · January 15th, 2010, 06:49 PM

good work there jon!

Turtle · April 28th, 2011, 04:25 AM

WELL THANKS FOR POSTING THE WIRING DIA. REALLY HELPED ME OUT AS i WAS LOOKING AT THE REAR LIGHTS YESTERDAY AND NOTICED THAT THE REAR TAIL LIGHT ASSEM ALSO HAS A PLACE FOR TWO MORE LIGHTS ON EACH SIDE OF THE MAIN RUN /BRAKE LIGHT LENS. i AM ASSUMING THAT THIS IS FOR JAPNESE OR EOURPEAN MODELS.. AND THAT THE US VERISIONS HAVE THE LOWER FENDER MOUNTED AMBER LIGHTS??? NO MATTER AS I PLAN TO ADD TWO BRAKE LITES IN THE FIXTURES FOR MORE BRAKIN LITE
Posted via Mobile Device

!!(0_o)!! · May 3rd, 2013, 02:54 PM

Nice! I've been looking for one somewhere and didnt want to but a service manual for one (even though I probably should anyway) @Turtle i always picture someone yelling when their caps lock is on.. Don't know why..

Alex · September 20th, 2013, 05:47 AM

@jonthechron - it looks like the pic link in the first post is no longer active. Do you have that IMG stored anywhere else by any chance? If you let me know, I can point the link to the right place.

In the meantime, here's a page that has some of these similar wiring diagrams.

106 · October 17th, 2014, 02:30 AM

Yeah I was also wondering if there happens to be a mirror for the file... =\

gokartmozart · November 5th, 2015, 06:58 PM

just posted that same page myself , found it a few months ago , very excellent NINJA250.ORG

InvisiBill · April 17th, 2016, 03:41 PM

Here's the PDF of the PreGen wiring diagram. I'm sure I got it from somewhere around here, but for some reason it wasn't in this thread.

(The thumbnail looks funny, but the file opens fine.)

Ceeloo Yello · October 17th, 2018, 11:18 PM

Thanx will come in handy soon.

PJocko · June 26th, 2019, 10:09 PM

I'm not able to open up the diagrams. I have the Haynes manual diagrams (A-MUCKIN-FAZING museum, kinda sketchy manuals lol) and I have a wire set that isn't identified in the Haynes diagram.

On my 2005 Ninja 250r, there's a wire pair I can't identify. It's well integrated into the harness so I THINK it's stock but I can't find info on it. It's bigger gauge than the rest (10 or 12g) .. one is black with a yellow trace (that one should be ground?) but the other one is white with a black trace. THAT one is throwing me. The pair shows full hot at all times without regard to key position (or even presence) and it ends in female spade connnectors at both ends with no apparent male spade connectors to *ahem* couple with - one end near the battery/junction box area and one end near the headlight end of things.

Any idea what I might be looking at?

DannoXYZ · June 26th, 2019, 11:46 PM

Those are auxilliary power connectors. I use them to power heated gloves, GPS and espresso warmer on my bike.

PJocko · June 27th, 2019, 12:06 AM

Quote:

Originally Posted by DannoXYZ

Those are auxilliary power connectors. I use them to power heated gloves, GPS and espresso warmer on my bike.

God bless everything about what you just said, especially the part where it answered my question.

JayVapes · March 5th, 2022, 11:25 AM

im reinstalling my wiring harness and i have come across a connector that is also stock to the harness. It has two wires leading into a two prong connector, the wires are both red/blue I have been searching to see if i am missing a part but I cant seem to figure it out. I do believe they may be the auxiliary leads but im not too sure, my bike has been in pieces for a couple years now... I dont see a wire or connection for a rear brake switch

JayVapes · March 5th, 2022, 11:30 AM

Quote:

Originally Posted by Turtle

WELL THANKS FOR POSTING THE WIRING DIA. REALLY HELPED ME OUT AS i WAS LOOKING AT THE REAR LIGHTS YESTERDAY AND NOTICED THAT THE REAR TAIL LIGHT ASSEM ALSO HAS A PLACE FOR TWO MORE LIGHTS ON EACH SIDE OF THE MAIN RUN /BRAKE LIGHT LENS. i AM ASSUMING THAT THIS IS FOR JAPNESE OR EOURPEAN MODELS.. AND THAT THE US VERISIONS HAVE THE LOWER FENDER MOUNTED AMBER LIGHTS??? NO MATTER AS I PLAN TO ADD TWO BRAKE LITES IN THE FIXTURES FOR MORE BRAKIN LITE
Posted via Mobile Device

how did you install two more lights??? was it a simple splice and tie in?

DannoXYZ · March 5th, 2022, 05:09 PM

check this out: https://www.ninjette.org/forums/showthread.php?t=317840

here's some connectors that fit into factory harness turn-signal connectors.

punishum808 · March 7th, 2022, 10:16 AM

What wires can I use to bypass this so I can use a toggle to turn on the power?

Mahalo in advance.

DannoXYZ · March 7th, 2022, 10:10 PM

Connect toggle-switch + 100-ohm resistor like this to ignition-switch connector:

punishum808 · March 8th, 2022, 11:05 AM

Quote:

Originally Posted by DannoXYZ

Connect toggle-switch + 100K resistor like this to ignition-switch connector:

Mahalo Danno, appreciate the info.

DannoXYZ · March 8th, 2022, 03:13 PM

You're welcome!
Be sure to disconnect battery before working on this.
That white wire comes directly from battery and is hot full-time.

BTW - also edited original post to say resistor = ~100-ohms.

MikeCL · December 14th, 2022, 03:28 PM

Thanks for this, the auxiliary power connectors what's the limits on them?

InvisiBill · May 20th, 2023, 08:53 AM

Quote:

Originally Posted by InvisiBill

Here's the PDF of the PreGen wiring diagram. I'm sure I got it from somewhere around here, but for some reason it wasn't in this thread.

Here's the same thing (basically just a screenshot of it) in PNG format, since that's sometimes easier to view than a PDF these days. It's an Archive.org copy of the file on my site, so it should outlive me.

January 15th, 2010, 02:33 PM	#1
jonthechron ninjette.org sage Name: Jon Location: Usa Join Date: Jan 2010 Motorcycle(s): magHitVE Posts: 649	1988+ Ninja EX250 FULL Wiring Diagram here! I have just edited a wiring diagram for the 1988+ Ninja EX250. I have made this diagram easier to follow and added some detail. This is version: US 0.3 (my version of the diagram) As you can tell it's still in its very early stages as cannot be compared to my newer diagram for the 2008+ 250r, in terms on quality, posted here. http://www.ninjette.org/forums/showthread.php?t=35886 Eventually, I will update this diagram to make it as best I can for you folks who need to troubleshoot or mod your bikes. If you have ANY requests or suggestions, please leave a comment here and I will look into them and possibly update the diagram. Here is a link to the diagram.

January 15th, 2010, 06:49 PM	#2
nate-bama North Alabama Mtn. ryder Name: Nate Location: Alabama Join Date: May 2009 Motorcycle(s): 2006 Posts: 537	good work there jon! __________________________________________________ QTRltrPWR

September 20th, 2013, 05:47 AM	#5
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	@jonthechron - it looks like the pic link in the first post is no longer active. Do you have that IMG stored anywhere else by any chance? If you let me know, I can point the link to the right place. In the meantime, here's a page that has some of these similar wiring diagrams. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

November 5th, 2015, 06:58 PM	#7
gokartmozart gokartmozart Name: randy Location: land of corrupt govt-illinois Join Date: Nov 2015 Motorcycle(s): 250 ninja ,it's realy a ninja motor on a scratch built alum chassis (avatar is my old kart) Posts: 22	250 wiring diagram just posted that same page myself , found it a few months ago , very excellent NINJA250.ORG Last futzed with by gokartmozart; November 5th, 2015 at 07:00 PM. Reason: forgot to name site

October 17th, 2018, 11:18 PM	#9
Ceeloo Yello ninjette.org guru Name: C Location: Hawaii Join Date: May 2011 Motorcycle(s): 250 Posts: 472	Thanx will come in handy soon. __________________________________________________ "It ended up being the loose nut behind the wheel"

April 28th, 2011, 04:25 AM	#3
Turtle ninjette.org newbie Name: Michael Location: Port Charlotte Join Date: Apr 2011 Motorcycle(s): 2002 Kaw Ninja 250/05 yama RSTD/03yama 1100 Classic Posts: 5	WELL THANKS FOR POSTING THE WIRING DIA. REALLY HELPED ME OUT AS i WAS LOOKING AT THE REAR LIGHTS YESTERDAY AND NOTICED THAT THE REAR TAIL LIGHT ASSEM ALSO HAS A PLACE FOR TWO MORE LIGHTS ON EACH SIDE OF THE MAIN RUN /BRAKE LIGHT LENS. i AM ASSUMING THAT THIS IS FOR JAPNESE OR EOURPEAN MODELS.. AND THAT THE US VERISIONS HAVE THE LOWER FENDER MOUNTED AMBER LIGHTS??? NO MATTER AS I PLAN TO ADD TWO BRAKE LITES IN THE FIXTURES FOR MORE BRAKIN LITE Posted via Mobile Device

May 3rd, 2013, 02:54 PM	#4
!!(0_o)!! ninjette.org member Name: Adam Location: New Orleans Join Date: Mar 2013 Motorcycle(s): 03 ex250 Posts: 41	Nice! I've been looking for one somewhere and didnt want to but a service manual for one (even though I probably should anyway) @Turtle i always picture someone yelling when their caps lock is on.. Don't know why..

October 17th, 2014, 02:30 AM	#6
106 ninjette.org newbie Name: Andrey Location: Sacramento Join Date: Oct 2014 Motorcycle(s): EX250 Posts: 6	Yeah I was also wondering if there happens to be a mirror for the file... =\

June 26th, 2019, 10:09 PM	#10
PJocko ninjette.org member Name: Mine or the bikes? I think I've settled on Saeko. I'm James. Location: Twin Falls, Idaho Join Date: Jun 2019 Motorcycle(s): 2005 Ninja 250R as a first bike! Posts: 32	I'm not able to open up the diagrams. I have the Haynes manual diagrams (A-MUCKIN-FAZING museum, kinda sketchy manuals lol) and I have a wire set that isn't identified in the Haynes diagram. On my 2005 Ninja 250r, there's a wire pair I can't identify. It's well integrated into the harness so I THINK it's stock but I can't find info on it. It's bigger gauge than the rest (10 or 12g) .. one is black with a yellow trace (that one should be ground?) but the other one is white with a black trace. THAT one is throwing me. The pair shows full hot at all times without regard to key position (or even presence) and it ends in female spade connnectors at both ends with no apparent male spade connectors to ahem couple with - one end near the battery/junction box area and one end near the headlight end of things. Any idea what I might be looking at?

June 26th, 2019, 11:46 PM	#11
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	Those are auxilliary power connectors. I use them to power heated gloves, GPS and espresso warmer on my bike.

March 5th, 2022, 11:25 AM	#13
JayVapes ninjette.org member Name: Honorio Location: Rio Grande Valley Join Date: Aug 2020 Motorcycle(s): Ninja EX250 Posts: 118 Blog Entries: 8	im reinstalling my wiring harness and i have come across a connector that is also stock to the harness. It has two wires leading into a two prong connector, the wires are both red/blue I have been searching to see if i am missing a part but I cant seem to figure it out. I do believe they may be the auxiliary leads but im not too sure, my bike has been in pieces for a couple years now... I dont see a wire or connection for a rear brake switch __________________________________________________ RIDE IT UNTIL THE WHEELS FALL OFF, THEN BUY NEW WHEELS

March 5th, 2022, 05:09 PM	#15
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	check this out: https://www.ninjette.org/forums/showthread.php?t=317840 here's some connectors that fit into factory harness turn-signal connectors. Last futzed with by DannoXYZ; March 5th, 2022 at 07:46 PM.

March 7th, 2022, 10:10 PM	#17
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	Connect toggle-switch + 100-ohm resistor like this to ignition-switch connector: Last futzed with by DannoXYZ; March 8th, 2022 at 03:14 PM.

March 8th, 2022, 03:13 PM	#19
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	You're welcome! Be sure to disconnect battery before working on this. That white wire comes directly from battery and is hot full-time. BTW - also edited original post to say resistor = ~100-ohms.

December 14th, 2022, 03:28 PM	#20
MikeCL ninjette.org member Name: Mike Location: Connecticut Join Date: Nov 2022 Motorcycle(s): ‘04 EX250 Posts: 157	Thanks for this, the auxiliary power connectors what's the limits on them?

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