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1989 yamaha 750 virago why does 20 amp fuse keeps blowing?

Posted by Anonymous on

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  • Yamaha Master
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Hi, Anonymous before diagnosing your blown fuse issue check the bottom of your seat if it's metal and comes in close proximity to the positive battery post you need to take the necessary steps to ensure there is no contact (electrical tape, thick rubber insulation, hammer a dent in the seat bottom etc.) also you are going to need a wiring from your service manual a test light, an ohmmeter and plenty of extra fuses. If you turn on your ignition switch and immediately blow a fuse you have a hard/dead short and is usually easy to find. With a test light connected to the hot side of the blown fuse holder start stabbing the wire/s that leads away from the fuse holder and towards the ignition switch, you test light will illuminate validating the short. When the test light fails to illuminate you have passed the short and need to back up until the test light illuminates, then look in the immediate area for the short.
If you driving down the road for 30 minutes or 15 miles and blow a fuse you have soft/flying short and may take some time and patience to find.
If the main fuse/circuit breaker constantly blows/trips while riding you probably have a faulty battery terminal connection. Check battery terminals for damage or corrosion, check battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary. Any other fuses that constantly keep blowing while riding are usually caused by a loose or corroded ground wire in the circuit, which means you have to check, inspect, test each and everyone with and ohm meter set on a low ohm scale 100 ohms or less . Simply touch one lead to the ground source and the other lead to the battery negative terminal, a reading of zero indicates a clean solid ground. Any number reading or infinity indicates a poor ground and needs to be repaired. Poor or weak grounds require excessive additional amperage to complete the circuit which in turn blows the small amperage fuse. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
ViragoTechForum com
http://viragotech.com/newtech/Main%20Fuse%20Blows%20Instantly%20(SOLVED%20thanks%20to%20TRV).html
Yamaha XVS650 Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xv-owners-manuals

Posted on Nov 10, 2016

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Hi,
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SOURCE: Yamaha Virago XV700 - 1987 Seat Removal

Most Yamaha models have 2 bolts holding the seat on, usually located between the top shock mounts and the side covers. You should be able to find them without too much trouble, but remember- they are metric. Hope this helps.

Posted on Jan 21, 2009

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SOURCE: 85 yamaha virago xv1000 are the coils & cdi igntor box interchang

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czaa
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SOURCE: Hi I have a 1989 Yamaha Virago the rear cylinder

better look at carb-there r 5 diff jets but its probly the mid range one-be careful here because rong ajust can hurt engine-u hav a clymer manual? library has many books on mc maintenance-sayonara

Posted on Sep 04, 2009

  • 101 Answers

SOURCE: the speedometer and tach lights not working....

Check the fuses. They are under the cover right below the gauges. Remove the screws and lift the cover off. Check the fuses with a test light or volt meter, dont trust your eyes to detect an open fuse.

Posted on Oct 05, 2009

  • 3567 Answers

SOURCE: My Virago 750 starts up nicely idle is fine but

The rubber seals and fittings between the carbs and cylinder head get hard and brittle. They can develop small cracks and also loose the seal they had when new and pliable. This means that extra air gets into the air/fuel mix as it heads for the intake valves. The air that has not gone through the carbs leans the fuel mix and causes the high revs. The seals and fittings will need to be replaced. Dealers have parts in stock for 10 years. Your bike is 22 years old. Google yamaha virago 750 parts also Google vintage motorcycle parts. Babbitt's would be a good source if the '87 and '88 parts match up. They list an '88 and have all the parts in stock except one hose line.
Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part and/or the notation "Not Available" is in the description, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx

Posted on Nov 24, 2009

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