Question about 1984 Honda VT 500 C Shadow

3 Answers

Tail light indicator remains on, 1984 honda shadow vt500

Posted by on

  • Anonymous May 23, 2009

    I have the same issue. As soon as I turn the key in the ignition, both front and rear lights come on. I know that we are required by law to have the front light on while driving, but not the rear... anyways, usually when I take the key out - all light turns off, but when I turn the key counter-clock (to lock the bike) sometimes the rear light turns on and stays lit... unless I out the key back in, turn on the ignition and then turn it off again... I guess a short circuit?

×

3 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Champion:

    An expert who has answered 200 questions.

    Cheetah:

    An expert who has answered 20 or more questions within one hour.

  • Honda Expert
  • 277 Answers

If the tail light is working, then look at the sensor, it is placed under the seat( it is a small black box 2x1,5cm) disconnect and clean contacts. Also put some contact spray in other wire joints.
Sorry for my English

Posted on Apr 23, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

I believe that Alex is talking about the "idiot light" labeled "Tail light" on the dash of his 84 Shadow. When this idiot light is lit, it is supposed to mean the tail light has burned out. My 85 VT700 has a problem where that idiot light fades on and off even though the tail light is working fine. If I apply the brakes (an brake light comes on), that idiot light goes out.

I have not solved the problem, but I did investigate this about 2 years ago. The Idiot light is connected to a small rubber encased box about 2 by 2 by 2 inches located under the tank, near the air filter on the right side. Several wires come out of that box. One wire provides power to the tail light. Another wire goes to the idiot light. My memory is fuzzy, but there probably is a ground and/or a battery lead coming out of the box as well.

I believe the circuit is measuring the current going to the tail light. If the current is too low (implying the bulb is burned out), then it connects the wire to the idiot light to ground or battery+. The circuit is falsely detecting low current.

Several things might fix this:
1) Change the bulb to one that draws more current.
2) Put a resistor in parallel with the tail light, to double the current.
3) Buy another "box" on ebay (I tried this, and it did not solve my problem).

I also have a related (?) problem with the low fuel light not working when it should. I tested the circuit to the low fuel sensor in the reserve tank, by grounding the wire, and Low fuel light works. I replaced the low fuel sensor, no change in problem.

I noticed, that if I take a several hour trip on the turnpike, the tail-light indicator will eventually go out and stay out. If that happens, and I run low on fuel, the "low fuel" indicator works again.

This has me thinking this could be a voltage problem. After a long high speed trip, the main voltage regulator normally reduces the voltage, to prevent over charging the battery.

I have wondered if the sensor circuit has a secondary voltage regulator (or a Zener Diode) in the idiot light cluster, which instead is providing full battery voltage to the sensor circuits. This would also explain why the "tail light" indicator turns off when I apply the brakes, since the overall voltage drops a little when the brake lights come on. The wiring diagram in my Honda repair manual does not go into that much detail, and I have not pursued this theory.

Posted on May 14, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

A most likely suspect would be a defective switch. Offhand:

  • tailight in all instances would would refer to the park or running light at the rear. This is controlled by the headlight light switch. If it is always own, then a short at the switch would be causing this;
  • it is also possible that you are referring to the brake light (brighter than the park/running light). There are 2 switches that activates the brake light; the front brake lever and the rear foot brake. Almost always, it would be the rear brake switch that goes faulty/shorted. A way to test is to temporarily remove 1 connector one at a time from both switches and note at which switch the light will go out.
Good luck and thank you for using FixYa.

Posted on Feb 22, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My 1984 honda shadow vt500 is stuck in 3rd gear how can i unstick it


Usually the problem is with gearshift lever. Move it 1-2 teeth up or down.

May 10, 2014 | Honda VT 500 C Shadow Motorcycles

1 Answer

Where can I download a free owners manual for a 1984 honda shadow vt500


http://hondatech.info/downloads/Moto/VT/VT500/
It is around 112mb though.

Oct 04, 2011 | 1984 Honda VT 500 C Shadow

1 Answer

I have trouble starting my 1984 Honda shadow vt500 when it is cold out, (below 10 degrees Celsius). What would be a good way to rectify that problem?


Check your battery as they don't like getting cold and will be less likely to start as you have noticed.
See if the CCA rating is on it and put in a heavier duty battery with a higher CCA rating. CCA is Cold Cranking Amps. The higher the rating the better the cold cranking power.
Also check your starter motor for general wear and tear. If your mechanically minded you could take it apart and give it a general clean up, if not best leave it alone.

Sep 18, 2011 | 1984 Honda VT 500 C Shadow

1 Answer

1984 Ascot VT500 gets power but engine will not turn. Wondering if the problem could be the starter. "Tail Light" light is on dash when key is turned to on position. Tried jumping it, engine...


Sounds like you have a seized engine. If it is seized with age, pour copius amounts of oil in through the spark plug holes and leave to soak for a few days. That will help with seized pistons. If it is bottom end, strip the engine down and repair as required.

Feb 08, 2011 | 1984 Honda vt 500 ft ascot

1 Answer

What is the battery voltage?


Your VT500 use a 12 volt battery and system.

Aug 28, 2010 | 1984 Honda VT 500 C Shadow

1 Answer

1985 Honda Shadow VT500 C. Rear turn signal function


they do not shine, only flash for turns.They do not do the same as the front ones.

Apr 12, 2010 | 1985 Honda VT 500 C Shadow

1 Answer

1984 Honda Shadow VT700 Taillight/All other rear lights out.


it be a bad ground connection to the bikes frame or a bad ignition switch

May 22, 2009 | 1984 Honda VT 500 C Shadow

Not finding what you are looking for?
1984 Honda VT 500 C Shadow Logo

1,562 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4477 Answers

yadayada
yadayada

Level 3 Expert

60960 Answers

Gino Cussen
Gino Cussen

Level 2 Expert

216 Answers

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

Answer questions

Manuals & User Guides

Loading...