80 SG keeps blowing the turn signal (30amp) fuse....

[ERM83]

I have no idea why all of a sudden. One common denominator: It was wet out when it started happening. I have a blade type fuse holder!

[skids]

I have no idea why all of a sudden. One common denominator: It was wet out when it started happening. I have a blade type fuse holder!

30 amp is not your turn signal fuse, is it? The main fuse is 30 amp.

[ERM83]

yep...didn't mean to hit the "3" key. regardless, it's blowing them out...all my connections look fine....

[skids]

Bulbs are correct? I would check for a wire with worn insulation between the fuse and the bulbs. Check the feed-through at the stalks near the fender and at the front end.

[ERM83]

I'm gonna check that now. I'm on my 5th try figuring it out / fuse at the moment. Just got back from a ride, and blew two of them..despite my efforts. I cleaned the HELL out of EVERYTHING. i'm (ONCE AGAIN) IRATE with this thing. Expletives galore at my apartment.

[ERM83]

One thing I should mention: it will just blow out while riding. I'll use my signal, turn it off, then the next time i try to use it, NOTHING.

WHY. I HATE ELECTRICAL PROBLEMS.

[3Phase]

Have you checked the switch itself for loose wires?

The solder work sometimes wasn't the greatest and the switch is old. Be very careful when you open the switch or if there weren't any loose wires when you opened it there will be before you close it.

[ERM83]

I also just put in a mike's xs signal assembly. wired it up correctly, and everything about a month ago. I THINK it may be the crimp in the right turn signal wire to the actual light...that makes the most sense. put a whole new assembly on, and it was FINE until the wet roads. will report back!

[ERM83]

well, just cleaned up the rear turn signal wire...still blows out after...about a minute and a half of riding. By the way, it'll just blow when i'm riding...not even using the signal. I can feel it. the bike just slows down, and then it doesn't work. I cannot figure this out for the life of me.

[skids]

You need to check the function of the voltage regulator at say 3500 rpms. It could be allowing overvoltage and over amping. ALTHOUGH I can't see it blowing the turn signal circuit without using the turn signals.

[ERM83]

You need to check the function of the voltage regulator at say 3500 rpms. It could be allowing overvoltage and over amping. ALTHOUGH I can't see it blowing the turn signal circuit without using the turn signals.

would the relay do this??? may be a stupid question...I just don't know my s*$% when it comes to the electrical aspects of these things...

[3Phase]

You need to check the function of the voltage regulator at say 3500 rpms. It could be allowing overvoltage and over amping. ALTHOUGH I can't see it blowing the turn signal circuit without using the turn signals.

It's probably not the relay. The SIG fuse is 20A because it's a catch-all circuit. If it's noticeable when it pops during a ride, that's a pretty decent short.

Let me find a schematic or several... alrighty then!

Flasher Relay
Flasher Self-Canceler
Self-Canceler reed switch in the Speedometer

Turn Signal Switch -- Brown/White wire from the Flasher
Turn Signal Lamps -- Dark Green or Chocolate wire from the signal switch
Turn Signal Indicator and the diodes for the Special -- Dark Green or Chocolate wire from the switch

Horn(s)

Fuel Light/Gauge
Neutral light and switch
Oil light and switch ('79 Special has the Brake Lamp Monitor circuit too)

2-pole Brown wire spade connector in the headlight shell:
Brake light switch (front and rear switches)
Switched and Fused Accessory Power -- normally not connected to anything

[3Phase]

And the Tachometer. Almost forgot.

[MPittma100]

Automatic Breaker

A great way to remove frustration when hunting a short circuit is to use an automatic reset breaker in place of the fuse as a tool. Can be had in 10-30 amp ratings. When the short occurs, breaker trips. When it cools down, it resets. Hunt for the short while the tripping occurs. When found, reinstall the correct fuse.

Buy them in any parts store.

[ERM83]

here's the thing...

I had ZERO problems with any fuses blowing until recently. the fuse i'm posting about blew once in traffic...but that was it. nothing like that happened for MONTHS. then, once again, I ride home from work when it's wet out...a NEW problem. I'm going to look into the instrument cluster, because it DEFINITELY isn't the reg / rec...switched that out, and it STILL blew within 3 minutes of riding. SOOOOO PISSED RIGHT NOW....