Question about 2004 Yamaha DT 125 R

1 Answer

I have a dt125 4j3 model no headlamp electrics i have put a volt meter on and it reads a minus voltage when lights turned on side light is ok it has had a new voltage regulator and rectifier and magneto windings any idears please thank you .

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 6 Answers

Ive had a similar problem with my 2007 dtx, but with the rear light and power valve. it turned out to be a dodgey connector. i dont know if the colours would be the same but it was the brown cable (the live +12v) coming from the ignition, it connected to 7 other wires and 3 were rusted off. it seems to me that yamaha have some kind of problem with their electrical skills, good luck!

Posted on Jul 21, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

02 Cavalier I have no headlights have parking lights brake lights turn signals I also have daytime running lights anybody have an idea


Could be the light switch is bad , but that would be just guessing ? And you don't want to replace parts form a guess posted on here !
The way to find the problem is with electrical testing , using a volt meter , wiring diagrams an leaning how to do automotive electrical testing , how to read an use wiring diagrams etc.. Testing B+ voltage to the headlamps an the ground circuit using voltage drop testing . That is if you want it fixed right .
Electric Testing Techniques You Need to Know
Elec Lesson 6 AC Diag 1
How to read an electrical diagram Lesson 1

Find a wiring diagram at http://www.bbbind.com/free_tsb.html free wiring diagrams . Enter vehicle info. year , make , model , engine size . under system click on lighting then under subsystem click headlamps . Buy a volt meter an test the circuits .
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts



Apr 04, 2017 | 2002 Chevrolet Cavalier Coupe

1 Answer

Back running lights won't work, blinkers and brakes both work changed the fuse and light bulbs any suggestions why the tail running lights won't run


Would need to test power from the headlamp switch . Go to http://www.bbbind.com/free_tsb.html free wiring diagrams. Enter your vehicle info , year ,make , model an engine . Under system click on lighting ,then under subsystem click on external lights .Then trace out where the tail lamps get power , do you know about automotive electrical circuits ,how to read a wiring diagram . Go on youtube check out videos on basic automotive electrical trouble shooting , how to do voltage drop testing an how to read wiring diagrams . Then get yourself a DVOM - digital volt ohm meter . Then test the circuit ! That's how automotive electrical problems are found .

Apr 08, 2016 | Cars & Trucks

2 Answers

How to fix headlights they wont come on at all and the switch/button wont light up as light indicator


Sorry Shannon but this is something best left to an automotive electrical repair shop. This is very complex with lighting control module controlling the lights . But if you want to try ,I suggest you go to youtube an check out some videos on basic electrical trouble shooting , how to read wiring diagrams , voltage drop testing . Then buy a DVOM - digital volt ohm meter . Go to http://bbbind.com/free_tsb.html , You can get free wiring diagrams there.

Feb 08, 2016 | 1991 Buick Park Avenue

1 Answer

2005. Why is left headlight not bright enough?


Check for corrosion in that circuit , ground , connectors etc. find a wiring diagram ! an a component location diagram . An do a voltage drop test on the circuit . Lets see if I can explain this , if you get a volt meter an check voltage at the head light connector , the R/L wire is B+ for low beams , with the headlamps on you should see B+ , if not , your problem is in the power side of the circuit . Now check the Black wire at the headlamp connector . I should tell you put the negative lead of the volt meter on the negative battery post an the red positive lead at the black wire . You should see no more then 0.2 millivolts ,if you see around 5 - 6 volts you have a bad ground - corrosion ! an this will cause a dim light .

Sep 24, 2015 | Dodge Stratus Cars & Trucks

2 Answers

The running lights and tail lights work but no headlights on my 1994 Buick Skylark Custom. What is wrong?


Hey Dan , do you have a volt meter ? Pull head lamp bulb , with lights on check for battery voltage on tan wire left headlamp an lite green right side headlamp ! If there is no voltage back track to headlamp switch , which means pulling the plastic cover from around the upper steering column ! check for battery voltage at the Orange wire in connector # 1 , that is voltage supply to the headlamp switch ! Power going in an no power coming out with the switch in the headlamps on position means your switch is bad !

Apr 02, 2015 | 1994 Buick Skylark

1 Answer

Electrical. All lights off when key is on.


check inside the ignition switch is clean and makes contact in the on position etc ! may need a new one !

Apr 28, 2014 | 1998 Suzuki GSF 1200 Bandit S

1 Answer

Driver side low beam headlamp out. replaced bulb--no go. checked fuse-fuse ok.


Remove the new lamp

Put a volt meter black lead to the engine
for a good ground or battery grd post

Then turn on the light & probe the lamp socket
one or two wires should read battery volts &
most likely the balck wire is ground & won't drop
any voltage

If good there or compared to other light connector
go after a broken or open ground wire

Dec 01, 2012 | 2004 Volvo V70

1 Answer

My 2003 883 Sportster, when turning on ignition key, instrument panel andheadlights turn on.When ignition button is pushed get a loud click, then nothing.No ignition, and lights go out.


Hi Anonymous, perform the following tests:
1. Fill acid type batteries to proper levels.
2. Charge battery overnight at 1-2 amps you need 12.5 volts or better after charging.
3. Hook up battery positive cable, then with your multimeter on the milliamp scale connect one lead to the negative battery post and the other lead to the ground cable. Meter should read 3 milliamps or less, 10 milliamps with a radio, 15 milliamps with radio and CB. If your meter reads higher you need to isolate the circuit by pulling fuses and circuit breakers one at a time and observe meter for drop in aprerage then get out your test light and track down the short in that circuit.
3. Make sure all connections are clean and tight especially the negative cable at both ends.
4. Hook up volt meter to battery and start engine, if meter falls below 9.5 v while cranking replace battery.
5. With engine running at 3600 RPM battery should read 14.3-14.7 volts if not continue tests.
6. Unplug voltage regulator from alternator at crankcase by front of primary cover.
7. To test voltage regulator go to: https://www.youtube.com/watch?v=F8EjV0IjW9Q
8. With ohm meter, one lead grounded, touch alternator pin meter should read infinity, if not replace stator.
9. With ohm meter, both leads touching alternator pins meter should read 0.1 to 0.2 ohms on 1989 and later models. 0.2 to 0.4 ohms 1988 and earlier models, if not replace stator.
10. With volt meter set on AC scale, both leads touching alternator pins meter should read
16 to 20 volts AC for every 1000 RPM'S 1989 and later and 19 to 26 volts AC for every 1000 RPMS. If not replace rotor.
17. For a free wiring diagram please visit the website below and good luck.Harley Davidson Wiring Diagrams and Schematics

Sep 26, 2012 | Harley Davidson XL Sportster 883...

1 Answer

My explorer, Eddie Bauer edition had an electrical problem, when you switched to the high beam lights, you could a hear a crackling and the light would go off, but if you switched back to the low beams,...


Or the headlamp switch or the low high dimmer switch ! Does it DRL - day time running lamps ? Ignition switch has nothing to do with the headlamps or power locks . Also if the ignition switch was the problem the vehicle wouldn't start . Here is a web site for wiring diagrams http://www.bbbind.com/free_tsb.html Enter your vehicle info. year , make , model an engine size ! Under system click on lighting then under subsystem click on headlamps ! Then click the search button , three links will pop up . Click them one at a time ! With a DVOM - digital volt ohm meter test for B+ voltage at the headlamp switch , turn on the headlamps on low an check for B+ voltage coming out . Check on high beam as well . Here are a couple of videos , check em out .
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts

Electric Testing Techniques You Need to Know

How to read an electrical diagram Lesson 1

Now i have given you enough resources to learn how to test electrical circuit , so test do guess .
There are a lot of good training videos on youtube ! How to test power door locks too .


Apr 21, 2017 | 1993 Ford Explorer Limited

1 Answer

Recently having problems with my 2000 Fatty not holding charge. What should stator be putting out on voltage meter? Voltage meter climbs as rpms go up, I would presume that this indicates stator ok? Bike...


First, take your battery somewhere and have it load tested. Fat Boys are tough on batteries as the battery sits in the "horseshoe" oil tank and is subjected to high temperatures due to the hot oil in the tank. Battery life is typically two years although I've seen some go longer and some not last that long. Have the battery tested before you start spending money.

To check the stator, you unplug the regulator at the engine case. Down inside the plug you'll see some electrical connectors. Connect a DVOM (digital volt ohm meter) to these connectors (one lead to eac pin) and put the meter in the 50 volt or higher range AC voltage. This is important that your meter be set to measure AC voltage because at this point, the voltage is indeed an Alternating Current voltage coming out of your alternator. Start the engine and bring it to a high idle. You should be reading over 20 volts AC. The book says that you should read 12-18 volts per 1000 engine RPM. If your engine is turning 2000 rpm, your meter should read 24-36 volts AC.

To test the regulator, first charge your battery to a full charge. Then connect your DVOM across the battery, red to positive, black to negative. Put the meter in the 20 volt DC range. Start the bike and bring it to a high idle. The voltage will start at somewhere around 12.5 volts and climb to about 14.5-15 volts. This would indicate that the regulator MAY be alright.

Now, have you changed any of the lights on your Fat Boy? I've seen people change and add lights to the point where their alternator could no longer put out the current necessary to handle the load. If this is the case, you may need a higher out charging system.

I don't know where you're located but $260 seems quite high for a voltage regulator.

Dec 30, 2009 | 2000 Harley Davidson FLSTF Fat boy

Not finding what you are looking for?
2004 Yamaha DT 125 R Logo

124 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

281 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers

Tony

Level 3 Expert

2600 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...