Question about 2007 Yamaha WR 450 F
Posted by Anonymous on
Hi, Anonymous 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 you OEM lights with 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 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 links below. Good luck and have a nice day.
Need help to make LED indicators to flash on my wr450 2003
Turn signals on wr426 not flashing WR 400 426 450
Yamaha WR450FR Owner Service Manual
OEM parts for Yamaha
YAMAHA WR450F Owner Manual
Posted on Oct 24, 2016
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Posted on Jan 02, 2017
Hi there! nice bike.. i serviced this type of bike before.. Anyway, I can see you replaced the relay (make sure it is compatible)... if other circuits fail there maybe a wire shorted to the ground (chassis).. check it physically for wear. Replace main fuse or better, check the fuses.
hope this helps.
Posted on Jun 21, 2009
You have a short. The longer you ride the worse it will get from vibration wearing off protective coating. Trace wires or finding curcuit and running new ones may be easier.
Posted on Aug 20, 2009
The service manual has a wiring diagram, but you will have to zoom in to read the wire colors.
You can download a free one at
Posted on Nov 21, 2009
SOURCE: everything comes on horn works
Hi and welcome to the site,
Initially,is there a clicking sound? If yes, then check the starter relay. Temporarily jump the 2 big terminals. To locate the starter relay, follow the big cable from the battery's + terminal.
If there is no clicking sound, try starting with the clutch lever pulled and/or the sidestand folded up.
Good luck and thank you for asking.
Posted on Aug 18, 2010
SOURCE: I have a 1978 yamaha
I used to have a 76 XS500. Got lots of compliments with that bike.
The wattage of the bulbs is important on how the blinkers work. The rate they flash, and if they flash is dependant on the current being drawn from the lights. Thats why many times if you have one light out the remaining light may stay on solid or flash faster.
You could try removing one bulb on each side and see if the blinkers work. Then reinsert and remove the other remaining bulbs. If they work normally with one bulb in each side whether front or rear then I would suspect the flasher relay.
Say the fronts work when the rear are out and the rear don't work when the fronts are out then I would suspect either the bulbs or sockets or your solder connection or switch.
You may also look into an electronic flasher. They automaticaly adjust for variable loads to flash so they flash at a normal rate.
Posted on Aug 24, 2011
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