MEP 803 A tripping CB1

[Guyfang]

We need to look at all the things that get power in Startup. Maybe start with K2? Pull the wire off of K2, and see if its something NOT in the Starter circuit? Or G1? See if the alternator is shorted?

 

[kloppk]

Sorry for the slow reply. Helping 4 people simultaneously with generator issues around the US this evening.
The START voltage signal comes from S1-7 and goes to TB5 terminal 14. In total terminal 14 will have 4 wires on it. Two on the top screw and two on the bottom screw.
The wire numbers for the 4 wires on TB5-14 are...
140A From S1-7
140B to K12-8 (feeds the Starter circuit)
140C to K15-A (feeds the Flashing circuit)
140D to the diagnostic connector on the outside top left.

Try disconnecting all wires from TB5-14. See if CB1 still pops.
If it doesn't then reconnect wire 140A to TB5-14 and see if CB1 pops.
If it doesn't then reconnect wire 140B to TB5-14 and see if CB1 pops.
If it doesn't reconnect wire 140C to TB5-14 and see if CB1 pops.
If it doesn't reconnect wire 140D to TB5-14 and see if CB1 pops.

 

[kloppk]

Last post was updated so be sure to refresh

 

[jaybird67k]

The START voltage signal comes from S1-7 and goes to TB5 terminal 14. In total terminal 14 will have 4 wires on it. Two on the top screw and two on the bottom screw.
The wire numbers for the 4 wires on TB5-14 are...
140A From S1-7
140B to K12-8 (feeds the Starter circuit)
140C to K15-A (feeds the Flashing circuit)
140D to the diagnostic connector on the outside top left.

Try disconnecting all wires from TB5-14. See if CB1 still pops.
If it doesn't then reconnect wire 140A to TB5-14 and see if CB1 pops.
If it doesn't then reconnect wire 140B to TB5-14 and see if CB1 pops.
If it doesn't reconnect wire 140C to TB5-14 and see if CB1 pops.
If it doesn't reconnect wire 140D to TB5-14 and see if CB1 pops.

It will probably be Monday before I can fool with it since I'm busy tomorrow. Thanks Kloppk for the detailed instructions.
I'll keep you updated. Is there anyway I can get a moderator to change the thread title to cb1 instead of cb3 ?

 

[kloppk]

@Guyfang can you change the thread title for the OP?
When Guy has a minute, I'm sure he'll update it for you.

 

[jaybird67k]

@Guyfang can you change the thread title for the OP?
When Guy has a minute, I'm sure he'll update it for you.

Thanks

 

[Guyfang]

Your wish is my command!

 

[Guyfang]

@Guyfang can you change the thread title for the OP?
When Guy has a minute, I'm sure he'll update it for you.

How did you know I was at a beer fest???????????????

 

[jaybird67k]

@Guyfang can you change the thread title for the OP?
When Guy has a minute, I'm sure he'll update it for you.

How did you know I was at a beer fest???????????????

Thanks

 

[jaybird67k]

Unplugged all wires from TB5 at 14 and it started normally. Hooked A up started hooked B up started hooked C up started hooked D up started with no CB1 pop.

All hooked up and CB1 didnt pop.
It's so intermittent. Why is it starting now.... Lol.
I'll try later when it heats up today outside.

 

[jaybird67k]

I don't think it started with all four unplugged but started with A B C and D plugged in. May have gave some goofey info there.
I believe it just made a noise with all four unplugged but didnt pop CB1.

 

[jaybird67k]

So after it sat in the sun for a bit went to start it and CB1 popped. So I did the wires again and this is what I get.
All four wires off= both solinoids click
A=both solinoids click
B= start
C=start
D= start

Now magically it's starting again
Frustrating.

 

[Guyfang]

What is A? Wire number?

 

[jaybird67k]

140 A that goes to S1 7

 

[jaybird67k]

I purchased a new CB1.
Gonna throw that at it and go from there.
I'll keep y'all updated.

 

[jaybird67k]

Update !!!!
So I purchased a CB1 from eBay and installed it and it works fine now. So I took the old one apart by drilling out the rivets and sanding down the blob of sealant. Inside I found the contacts were corroded or burnt not making a good connection.
I cleaned both contacts on the old one and reassembled it and it also works fine now.
I have attached pictures from the inside of the old one. I only have one picture of a dirty contact because I cleaned one before I got a picture.

Thanks for all the help and I hope this helps someone in the future.
Also if someone can explain why dirty contacts would make it trip that would be awesome.
Reminded me of dirty points on a car engine that we used to have to clean.