blowing fuses


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re774c
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Location: seguin, texas
Motorcycle: 1989Aspencade GL1500

blowing fuses

Postby re774c » Thu Jul 17, 2014 4:10 pm



Ok, I keep blowing the tail light fuse. I had the same issue a couple of weeks ago. I took the saddle bags a part and looked at all the wires and bulbs. I did not find any thing obvious. Giving up for the day I was pushing the bike in the garage and noticed a wire hanging off of the front brake switch. Problem solved, so I thought. Problem started again today, switch is the first place I looked and everything was connected. When the fuse blows I loose headlights, tail lights, running lights, all of the warning lights on the console the tachometer, fuel and temp gauges. Anyone have any suggestions?

1989 GL 1500 Aspencade



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MikeB
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Re: blowing fuses

Postby MikeB » Thu Jul 17, 2014 8:39 pm

Take a look at this pictorial; diagram. The fuse that is opening is Fuse #8, the one in the center on the top of the page. All I can suggest is trace it out.
MikeB
Tacoma, WA, USA

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virgilmobile
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Re: blowing fuses

Postby virgilmobile » Fri Jul 18, 2014 7:33 am

Because the circuit goes everywhere and you've looked in the obvious places,I'll make a suggestion that might help.
Considering its a 15 amp fuse that's blowing,get a automotive headlight. Any 12 volt lamp that is around 50 watts(5-7 amp).
Attach 3' of # 14 wire to it and 2 push in blade connectors on the other end.
Use this in place of the blown fuse.
Turn on the key.your bikes lights will light up....not full brightness.. AND the test headlight fuse replacement thingy will light too.somewhat...

The neat part is as you wiggle,poke,prod,and otherwise try to blow the fuse...as soon as you get it to short out..the test lamp simply goes to full brightness.
You can now locate the short area without constantly replacing that fuse.

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re774c
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Re: blowing fuses

Postby re774c » Fri Jul 18, 2014 6:47 pm

Thanks, I will have to try that. I am already on my 2nd 50 pack of fuses. I thought I had found the problem. The bike ran with all the lights
Working for a good 5 minutes, then I bumped it and poof no more lights. Very frustrating.

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virgilmobile
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Re: blowing fuses

Postby virgilmobile » Fri Jul 18, 2014 7:57 pm

This actually works.I usually select a lamp that draws the same current as what normally flows through the bad circuit.This will split the load and the test lamp and the bike will be equally dim.
The moment the short happens, the test lamp goes full bright and the bike goes dark.

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TerryRuth
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Re: blowing fuses

Postby TerryRuth » Sat Jul 19, 2014 12:38 am

is this safe? will it keep from toasting wires..............no way i want a harness job
my 15 that runs fuel gauge warning lights..kickstand ,, low oil etc
just repaced alt and has never done it before........ideas?

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virgilmobile
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Re: blowing fuses

Postby virgilmobile » Sat Jul 19, 2014 9:47 am

TerryRuth wrote:is this safe? will it keep from toasting wires..............no way i want a harness job
my 15 that runs fuel gauge warning lights..kickstand ,, low oil etc
just repaced alt and has never done it before........ideas?


Safe.certainly.its the same as blowing the fuse.Just the energy is used to light the test light rather than blow another fuse.
Can you rephrase the last part about your "15".im not following .

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TerryRuth
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Re: blowing fuses

Postby TerryRuth » Sat Jul 19, 2014 11:28 am

ok replaced alt it charges at 14.2 good ......... have had an issue would not start in gear with clutch in .. then would not start at all was lower solonoid,, when i jumpered it it would start...so i ran a switch to activate it ,, long storey short..toasted solonoid... bolted blue and red together to get me by(eliminated bottom solonoid) bought new solonoid and put back to oem now it wont start AND when it does start it blows fuse # 8 15 amp[tail
meter
position
fyi starts in gear with clutch in now fixed itself or my grips are too big i have to pull hard
terry

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BullCBX
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Re: blowing fuses

Postby BullCBX » Sat Jul 19, 2014 3:26 pm

When trying to find an electrical issue on mine, I ended up getting both a 10amp and 15amp (blade style) circuit breakers that can be reset. I picked mine up at NAPA for around $5.00 a piece. A lot cheaper than continually replacing fuses.

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virgilmobile
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Re: blowing fuses

Postby virgilmobile » Sat Jul 19, 2014 3:34 pm

TerryRuth wrote:ok replaced alt it charges at 14.2 good ......... have had an issue would not start in gear with clutch in .. then would not start at all was lower solonoid,, when i jumpered it it would start...so i ran a switch to activate it ,, long storey short..toasted solonoid... bolted blue and red together to get me by(eliminated bottom solonoid) bought new solonoid and put back to oem now it wont start AND when it does start it blows fuse # 8 15 amp[tail
meter
position
fyi starts in gear with clutch in now fixed itself or my grips are too big i have to pull hard
terry

I'll start poking around the schematic to see what kind of testing I can come up with
Just so I got this straight.Its wired OEM and will not crank but when it does crank and start it blows the 15 amp fuse.The fuse does not blow I till it starts?

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TerryRuth
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Re: blowing fuses

Postby TerryRuth » Sat Jul 19, 2014 5:31 pm

correct SEE NEW POST ..... ONLY NEUTRAL LIGHT.......NO 1.FUEL GAUGE 2.KICKSTAND DOWN
3.NO LOW OIL PRESSURE 4.NO REVERSE LIGHT ergo no reverse

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re774c
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Re: blowing fuses

Postby re774c » Sun Jul 20, 2014 5:59 pm

Ok, I know when the electrical gremlins are laughing at me and they are hysterical right now. Mechanical or structural yes, electrical no.
I thought I had it fixed, it ran for 10-15 minutes with all the lights working then I pushed it off the center stand and pop no more lights. Now, even using the above explained test light I can't get any lights to work. I opened up the fuse box. I have good power to the box, power to the fuse(with test light attached), power along the metal strip connecting all of the light fuses, power in and out of the relay. I traced the white, black stripe, grey dots, wire up the left side of the bike to the left faring pocket. Good continuity and voltage to there. I am assuming both of these wires go to the instrument cluster? Could the instrument cluster be bad? Any other ideas would be great.
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virgilmobile
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Re: blowing fuses

Postby virgilmobile » Sun Jul 20, 2014 6:15 pm

With the key on,does the test light...light up full brightness?
You don't show what the lamp is...what wattage is it or what lamp is it.
As soon as you moved the bike the fuse blew?

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re774c
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Re: blowing fuses

Postby re774c » Sun Jul 20, 2014 6:21 pm

The test light is full bright. Don't know the amps but it is an HTC head light. As soon as it came off center the fuse blew. It's on center now and I can't get any lights at all, just the test light.

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virgilmobile
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Re: blowing fuses

Postby virgilmobile » Sun Jul 20, 2014 6:26 pm

By the way,the output of the tail(main) relay is brown/blue..brown/white at the insturments and marker lights.input to the relay from #8 fuse is white/yellow.
I hope...

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virgilmobile
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Re: blowing fuses

Postby virgilmobile » Sun Jul 20, 2014 6:33 pm

Great...the test lamp is full bright.Yeaaaa...That means that somewhere your gremlin has finally shorted to ground.
Assuming that its a general headlight it should be pretty bright and getting very warm.protect the surrounding area from the heat.
Start by turning the handlebars,moving the suspension,wiggle,jiggle anything you can get your hands on.with the key on(not running).when the short lets go the test lamp will dim and the other lights will come on dim also.
PM me if you get lost.I can talk you through it if necessary.

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re774c
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Re: blowing fuses

Postby re774c » Sun Jul 20, 2014 6:37 pm

Her is a picture of the wires going to and from the #3 relay.
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virgilmobile
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83 GL1100 I
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84 GL 1200 I

Re: blowing fuses

Postby virgilmobile » Sun Jul 20, 2014 7:01 pm

The brown one is the output of the relay.it feeds everywhere.
That's the wire that has a short on it.
Usually a pinched wire or chafed add on wiring.OEM wires generally don't short to the frame.

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re774c
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Re: blowing fuses

Postby re774c » Thu Jul 24, 2014 10:47 pm

Well I did not find a definite cause for the short but after systematically removing panels and unplugging wires I get it to work. I removed the left cornering panel and disconnected the light the problem went away. Never could get it to repeat the problem. Been back on the road for a couple of days now with no issues.

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virgilmobile
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83 GL1100 I
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84 GL 1200 I

Re: blowing fuses

Postby virgilmobile » Fri Jul 25, 2014 7:01 am

Sounds like your in the problem area at least.
Keep us informed.




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