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Jun 18, 2023 | 10:59 AM

#11

Dan89FLSTC

Seasoned HDF Member

Joined: May 2008

Posts: 21,221

Likes: 12,816

From: South Carolina

Quote:

Originally Posted by hamah

circuit breaker is open and one side is grounded?

There is no ground on a circuit breaker on a Harley.

The ground is at each electrical component.

OP:
No reason to test that ancient circuit breaker, toss it.

Jun 18, 2023 | 12:51 PM

#12

hamah

Road Warrior

Joined: Feb 2016

Posts: 1,354

Likes: 399

From: Vancouver, BC

Quote:

Originally Posted by Dan89FLSTC

There is no ground on a circuit breaker on a Harley.

The ground is at each electrical component.

OP:
No reason to test that ancient circuit breaker, toss it.

Of course, that's basic knowledge. But the question from Jackie Paper was why is it you see 12V across the posts if the circuit breaker is bad. I was speculating because I don't know. I didn't even know you'd test for a bad breaker that way on a Harley. I just replace them when they act up. So what's the answer?

Last edited by hamah; Jun 18, 2023 at 12:54 PM.

Jun 18, 2023 | 12:57 PM

#13

FLHRinFL

Cruiser

Joined: May 2020

Posts: 232

Likes: 452

From: SW Florida

Quote:

Originally Posted by hamah

See my original post, #10.

Jun 18, 2023 | 01:04 PM

#14

hamah

Road Warrior

Joined: Feb 2016

Posts: 1,354

Likes: 399

From: Vancouver, BC

Quote:

Originally Posted by FLHRinFL

See my original post, #10.

ahh... I misread that and missed the switch being on. My bad. Still, I've never tested for that and, as with a suspect fuse, I just replace

Last edited by hamah; Jun 18, 2023 at 01:05 PM.

Jun 18, 2023 | 01:59 PM

#15

Dan89FLSTC

Seasoned HDF Member

Joined: May 2008

Posts: 21,221

Likes: 12,816

From: South Carolina

Quote:

Originally Posted by hamah

If the meter reads system voltage across the posts on the breaker, it means the circuit breaker is open.

Of course, that`s basic knowledge.

The meter reads the voltage differential between the probes on the meter.

Last edited by Dan89FLSTC; Jun 18, 2023 at 02:01 PM.

Jun 18, 2023 | 02:24 PM

#16

Jackie Paper

Seasoned HDF Member

Joined: Mar 2010

Posts: 38,733

Likes: 6,493

From: Honah Lee

Quote:

Originally Posted by hamah

I was being polite as best I could. Back up there, if it failed either of the first two test, it was bad. That third test if it was bad and open, you still would not see voltage.

Dan is correct in the fact if it really is blowing and all is good down stream on what it is driving, then it may be easier as cheap as it is to get another.

But it's real easy to actually test if it was open. Not so much if the problem is down stream. Then you need to amp test what's popping it.

I assume this is a cooling off reset breaker.

I was the head of the property committee of a small church. Lead because I fixed everything and also because I didn't do all the hoops to secure funds.

One of the huge heat pumps was not running. Couple checks showed no power on the 100 AMP breaker. I put my analog AC load meter on it . Reset it and it just would not stay in. Everything was off not calling for cool. Problem was my meter was to slow to catch the the load.

That huge breaker was pretty expensive. I ate that one. The compressor was burnt up and one leg of the 120 was ground.

Last edited by Jackie Paper; Jun 18, 2023 at 02:29 PM.

Jun 18, 2023 | 02:33 PM

#17

RANGER73

Club Member

Joined: Sep 2010

Posts: 15,445

Likes: 7,136

From: Beyond Fucital

Also, the red wire should be by itself. The Voltage regulator wire should be on the battery side. Those circuit breakers are also auto reset. If its not resetting, it’s bad.