Question about Honda CB 750 Nighthawk Motorcycles

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1984 honda 650 nighthawk the turn signals do not work the front running lights come on but when turn signal switch is moved the light on that side goes out the rear signals do not work at all

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  • Honda Master
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Hi, Justsayyes75 before testing any electrical component in the Light Circuit it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test because your battery may have 12.5 volts or more but little or zero amps causing the battery to be faulty and must be replaced, especially "AGM" batteries, also before diagnosing any turn signal/running light/parking light issue make sure the bulb is good and the light fuse has continuity with a test light. If you have replaced your OEM lights with one or all LED lights you are going to need a load equalizer.
If no turn signals work the cause could be a faulty turn signal module or the connector going to it, look for corroded, loose, or broken pins/sockets. Contact spray cleaner is great for removing corrosion.
If all four turn signals flash at the same time like hazard lights even though you only pressed one turn signal button then you have a LED light in the circuit and need a load equalizer that can be purchased from any motorcycle parts supplier.
If your speedometer does not function properly it will have to be fixed first because your turn signal module gets the data from the speedometer for normal turn signal function.
If your front turn signals don't work use a test light to check for power and ground at the bulb socket, then start backtracking the wiring through every wire connector to the turn signal switch/button and check for continuity, go all the way back to the fuse if necessary to find the cause of the malfunction.
If your rear turn signals don't work check your rear fender wiring harness connector first for corroded, broken, loose pins/sockets, power, and a good ground, the harness connector is usually located under the seat on the front of the rear fender then keep tracing the wiring look for obvious harness damage caused by the rear tire.
If you still can't find the malfunction backtrack from the rear fender wiring harness connector.
If one side does not work you could have a faulty turn signal switch or module check for continuity.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
1984 Honda Nighthawk 650 turn signals wiring problem
Trying to troubleshoot turn signal not flashing
Honda CB750f2 Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CB750F2 Owner Manual

Posted on Jul 24, 2017

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Posted on Jan 02, 2017

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  • 345 Answers

SOURCE: Passat 2000 turn signal problem

sound like you have a poor earth on the rear lights or indicator circuit

Posted on Oct 23, 2008

  • 1 Answer

SOURCE: brake lights/rear turn signals

I had the same problem with my 1999 Yukon. The electric board needed to be replaced. Rust starts to build up and shorts out or blows the bulb. The dealership charged $73.60 for the part and I installed it myself (Saved $30).

Posted on Jan 05, 2009

  • 508 Answers

SOURCE: Rear turn signals and brake lights won't work

Probably the turn signal switch assembly. This is a common problem with the older Fords. The switch is a self contained unit at a cost of about $100.00.

Posted on Feb 09, 2009

  • 10 Answers

SOURCE: brake lights/rear turn signals not working

chk ur fuses

Posted on Mar 18, 2009

red54eyejp
  • 25 Answers

SOURCE: front driver side turn signal light doesn't flash

replace flasher......usually located in fuse block area...listen in this area....select passenger side ...then select driver side...you can hear flasher clicking...you have seperate flashers for each...FLASHERS are small cubes plugged into fuse block....probable bad driverside flasher

Posted on May 09, 2009

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I replaced my turn signals in my 84 nighthawk w aftermarket one and chopped of my rear liscence plate mount and light now i cant get my new turn signals or front one to work at all. All that happens is the...


cheak to make sure they are wired correctt it sounds like you might of crossed some wires does the indicatoer stay lite when the turn switch is off that would licnence plate light hooked into signal

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I have a 1984 v65 1098cc-problem is turn signals'some times they work or don't.if i ride it for 10-15 miles they generaly come on.i have checked fuses' wireing harnes'+connections-replaced...


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Aug 16, 2011 | 1984 Honda VF 1100 C

1 Answer

1984 Honda GL 1200 Aspencade Gold Wing turn signals not working


Hi, Weasmel4342 before testing any electrical component in the Light Circuit it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test because your battery may have 12.5 volts or more but little or zero amps causing the battery to be faulty and must be replaced, especially "AGM" batteries, also before diagnosing any turn signal/running light/parking light issue make sure the bulb is good and the light fuse has continuity with a test light. If you have replaced your OEM lights with one or all LED lights you are going to need a load equalizer.
If no turn signals work the cause could be a faulty turn signal module or the connector going to it, look for corroded, loose, or broken pins/sockets. Contact spray cleaner is great for removing corrosion.
If all four turn signals flash at the same time like hazard lights even though you only pressed one turn signal button then you have a LED light in the circuit and need a load equalizer that can be purchased from any motorcycle parts supplier.
If your speedometer does not function properly it will have to be fixed first because your turn signal module gets the data from the speedometer for normal turn signal function.
If your front turn signals don't work use a test light to check for power and ground at the bulb socket, then start backtracking the wiring through every wire connector to the turn signal switch/button and check for continuity, go all the way back to the fuse if necessary to find the cause of the malfunction.
If your rear turn signals don't work check your rear fender wiring harness connector first for corroded, broken, loose pins/sockets, power, and a good ground, the harness connector is usually located under the seat on the front of the rear fender then keep tracing the wiring look for obvious harness damage caused by the rear tire.
If you still can't find the malfunction backtrack from the rear fender wiring harness connector.
If one side does not work you could have a faulty turn signal switch or module check for continuity.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Turn signal problem GL1200
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http://www.partsfish.com/page/oem-parts-for-honda
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1 Answer

I need to know how to wire up my signal lights for my 1984 honda shadow vt700c motorcycle


All Honda turn signals wire the same. The wires are color coordinated and the same on all models. Sky blue wires are for the right side and orange wires are for the left side. The running lights the same colors (blue on right and orange on left) they just have a white stripe or a white band on the blue or orange wire. The most important thing to remember is the turn signals have to ground to the green wires in the harness not to the frame. If you do not ground the signals through the wiring harness you may have issues down the road. Every motorcycle I have purchased that had a windjammer fairing on it, had to be rewired. The turn signals had not been wired using the green ground wires and they did not work correctly. The turn signal should be flash brighter than the running light. If the running light is brighter than the turn signal the offending front signal is wired backwards.

Mar 03, 2011 | 1984 Honda VF 1100 C

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Honda always grounds the turn signals separately (usually a green wire)not directly to the frame.Not hooking up the running light should not effect anything except forward visibility to other motorists. If you have a two prong flasher relay, go get a cheap flasher relay ($5-$10) and replace it. The only problem I have ever heard of when switching to LED turn signals is a flicker / fast flash instead of a normal slow flash. This is remedied by adding diodes to the wires.

Jun 30, 2010 | 1985 Honda CB 700 SC Nighthawk

1 Answer

Cb750k2, right-side turn signals are sluggish, left-side lamps light but don't blink and no sound. have replaced ground on both sides.


sounds like your ground wire is off. check that first. they do have a turn signal blinker also. also try replacing the bulb.

hope this helps

Apr 15, 2010 | 1984 Honda CB 700 SC Nighthawk

1 Answer

Color code for turn signal wires


Hi and welcome to FixYa,

Honda in general uses standardized wiring scheme:
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  • light blue - right turn signal;
  • orange - left turn signal.
Good luck and thank you for asking FixYa.

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