what size fuse? 80 450

[Richharr]

I've got pretty much nothing (blinkers, warning lights, etc) on my 80-82 gs450 and I blew the fuse several time on the way home today. doesnt look like its grounding out anywhere. It had a 15a and I bought 20a to get me home and they blew too....3 of em. what should I check first, btw I blew 2 taillights bulbs this year. any thoughts.


on the plus side,. the motor is pulling like crazymy friend trump in having trouble keeping up and suzuki has earned his respect after today..

[jed.only]

what kind of voltage is the bike putting out?

[TheCafeKid]

I've got pretty much nothing (blinkers, warning lights, etc) on my 80-82 gs450 and I blew the fuse several time on the way home today. doesnt look like its grounding out anywhere. It had a 15a and I bought 20a to get me home and they blew too....3 of em. what should I check first, btw I blew 2 taillights bulbs this year. any thoughts.


on the plus side,. the motor is pulling like crazymy friend trump in having trouble keeping up and suzuki has earned his respect after today..

Shouldnt be any larger than 20amp for that particular application I wouldnt think. If you put anything bigger in there after blowing both of those sizes, then you're looking at a possible electrical fire/meltdown. You've, by my guesstimation, got something going on in the system. Fortunately, these bikes are pretty simply wired. If you have a Clymer or Suzuki shop manual for your bike, it will have the wiring diagram in the back. Trace things back and see if you can find the short/open in the circuit. If you dont have a manual, i suggest you get one. No one here will likely be able to help you off the top of their head regarding this, but someone MIGHT have a copy of your manual they could help you out with, or scan a page or two for you.

[Steve]

Does your bike have only one fuse or several?

For the bikes that have several fuses in a panel, the MAIN fuse will be a 15, the AUX fuse will be a 5, all the others are 10.

For the single-fuse bikes ... I would guess no more than 15, as that would be the same as the main for the other bikes.

.

[chef1366]

I bet your R/R is fried if for sure you don't have a short anywhere.

[TheCafeKid]

Does your bike have only one fuse or several?

For the bikes that have several fuses in a panel, the MAIN fuse will be a 15, the AUX fuse will be a 5, all the others are 10.

For the single-fuse bikes ... I would guess no more than 15, as that would be the same as the main for the other bikes.

.

Could be wrong but i think the single "glass" fuse bikes used a 20amp.

[TheCafeKid]

I bet your R/R is fried if for sure you don't have a short anywhere.

I would agree if he had said he was blowing headlights, or had fluctuation there, but he didnt, so I didnt go that far. Certainly a possibilty however.

[tas850g]

i was blowing my ignition fuse 15A, I think, b/c i had 4 bare ignition wires making contact with either one of the other wires or the frame. Fixed the wires and no more blown fuses. R/R seem fine. There must be a short somewhere there or it is the R/R. I have melted wires before with a too big of a fuse. Patience!

[Richharr]

its one glass fuse, no other fuses on the bike. headlight is fine, tail light blew. I'll have to break out the manual when I have a chance.

[TheCafeKid]

its one glass fuse, no other fuses on the bike. headlight is fine, tail light blew. I'll have to break out the manual when I have a chance.

Do yourself a favor, and ditch the one glass fuse set up. Cut it out and swap to a newer blade style holder and fuse. Those glass ones over the years become very touchy. I about went mad looking for an open on my cafe, only to find that the fault was at the fuse holder itself. It would intermitantly pass current. Very frustrating.

[Richharr]

Do yourself a favor, and ditch the one glass fuse set up. Cut it out and swap to a newer blade style holder and fuse. Those glass ones over the years become very touchy. I about went mad looking for an open on my cafe, only to find that the fault was at the fuse holder itself. It would intermitantly pass current. Very frustrating.

I was planning on it.

[aquamon]

regulator/rectifier gone bad will blow your lamps and fuse.

[TheCafeKid]

regulator/rectifier gone bad will blow your lamps and fuse.

I agree its certainly a possibility. However, one would think that a bad R/R that is causing lights to blow will effect them globally. The Headlamp and tail lamp are not on the same circuit however, and he seems to indicate that its only blowing the tail lamp and running lights, which are on the same circuit. (i think the gauge lights might be on there in some models too) this would lead me to suspect something in THAT circuit. Dont get me wrong, i wouldnt rule out the R/R, but have you checked it yet? Is the bike charging above 15.5 at any particular RPM?

[BassCliff]

Hi Mr. Richharr,

Sorry I'm late with this information. I just asked my buddy Ian, who has an '80 GS450S, and it uses a single 10 amp fuse for the whole bike. If you're blowing fuses, troubleshoot your electrical system. Clean all the electrical connections and grounds, check for bare wires and melted insulation, etc. Please pardon my PGO (Profound Glimpse into the Obvious).

Here's Ian's GS450.





Thank you for your indulgence,

BassCliff

[aquamon]

Shorts are really easy to find, come on, dude.
Maybe clamped unto handle under r/h or l/h clamps...tail lamp blows due to vibration.

Nice bike basscliff, i renovated mine 10 years ago and parked it, now I took it out, I'd like to send "whoever" the reverse engineered Igniter for him to play with and post as he did with the 850.
I don't remember who it was...
Okay, I found it, by matchless...not for 850 but gs1000.