Question about Suzuki Motorcycles
1978 Suzuki gs1000 left turn signal not working, right does, swapped wires and left worked. Then they both stopped working, ordered NOS turn signal relay but still nothing. Help me please @
Hi, Jesseok580 before testing any electrical component in the Turn Signal 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, "AGM" batteries fall into this category more so than lead-acid types, 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 are working the cause could be a faulty turn signal module/flasher or the connector going to it, look for corroded, loose, or broken pins/sockets. Contact spray cleaner is great for removing corrosion.
If your turn signal comes on but takes several seconds before it starts flashing you may have dirty contacts in the turn signal switch/button, the switch needs to be opened up and cleaned also the flasher may be starting to fail. It should be noted that cold weather will only exacerbate the situation especially when temperatures drop down below freezing and the location of the component, turn signal switches on the handlebar are at the mercy of the oncoming freezing 70 mph wind and makes it hard for the contacts to do their job covered in frozen grease/grime
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, look 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 for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Troubleshoot Repair motorcleTurn signal light
Suzuki GS1000 Service Manual
Posted on May 14, 2019
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Posted on Jan 02, 2017
i have a wiring diag but it wont load on here ?
inside headlight shell the should be
right front-------grey / black / black with white tracer.
left front --------same again..
right rear-------black / black white tracer
left rear ------- same again..
Posted on Nov 01, 2009
SOURCE: I have a 1978 Suzuki
Do Not use the diagrams. Your turn signals have certain colored wires that go to them as well as the headlight. Make sure you run a ground wire . If the turn signal uses a separate ground keep it separate. Your Windjammer wiring harness is also color coded . Make sure the colors used for the right signals in the fairing go to the corresponding colors for the right turn signal, then the headlight, then the left turn signal , Extra power wire for a cellphone charger or radio. I have purchased 6 motorcycles with Windjammer fairings on them and had to rewire each one because the installer could not follow the instructions and do it correctly. The only thing that might make your install tricky is if the fairing harness colors do not match from one fairing quick connector to the other. Draw a diagram on a piece of paper to keep your colors straight.
Posted on Oct 16, 2010
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