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Buell Motorcycle Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through September 24, 2008 » What's wrong with the "77" plug? « Previous Next »

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Lousirider
Posted on Sunday, September 21, 2008 - 09:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Ok, I tried finding this out on my own, but all I found is you experts referring to it. My service manual saids this is the voltage regulator plug. So, whats wrong with it on the 06 Ully?

thanks
James
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Nipsey
Posted on Sunday, September 21, 2008 - 10:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

For whatever reason it arcs or shorts out - here is a link that has much words on it as well as a link to a doc to diagnose if there is an issue.
http://www.badweatherbikers.com/buell/messages/142 838/384852.html

I am not sure it is an 06 specific issue, but at some point (08?)Buell lowered the stator output - also not sure if it has anything to do with the issue.
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Teeps
Posted on Sunday, September 21, 2008 - 11:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

My take on the subject:
1. the terminals are too small for the amount of current passing through them.
2. water invades the connector and causes corrosion.
3. the pin fit (terminal connection) is loose for what ever reason.
In all the above conditions, resistance is the problem. A high resistance, in this connection, will cause localized heat that can lead to melting of the '77' coupler and finally electrical short circuit.

The rest of the story is well documented in other threads.
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Tootal
Posted on Sunday, September 21, 2008 - 11:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Funny you should bring that up. I just checked mine out of curiosity and it was clean with no signs of any problem. I put some dielectric grease on the terminals anyway just to keep any future corrosion away and put it all back together. A little proactive maintenance might keep anything from happening in the future. I hope anyway!!
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Sparky
Posted on Sunday, September 21, 2008 - 10:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Maybe it's just me, but I think of dielectric grease as an insulator. That's not something I'd want to put on metal terminals that have to conduct large amounts of current.

I'll put it maybe on the outside of the rubber or plastic connectors after the clean metal contacts are mated or sparingly on the inside of spark plug boots before snapping them onto the plugs. That tact has worked well for keeping water and corrosion out for thousands of miles.

I understand what you are trying to do by preventing corrosion though. I hope it pans out for ya in the long term.
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Court
Posted on Sunday, September 21, 2008 - 10:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Some input
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Darthane
Posted on Monday, September 22, 2008 - 08:38 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

1. the terminals are too small for the amount of current passing through them.
2. water invades the connector and causes corrosion.
3. the pin fit (terminal connection) is loose for what ever reason.


1. The terminals are fine for the amount of current passing through them, trust me.

2. and 3. are both related to a loose connection, which is why you generally see people suggest placing a zip-tie around the pair of connections to insure they remain seated properly.

The location of this connection on my '03 Firebolt places an undue amount of stress on the connector retention features, which in some cases can cause it to wiggle just loose enough to either allow moisture to enter the connection or to cause the terminals to disengage enough to cause arcing, which causes pitting and overheating, which can destroy the connection over time. It's vertical orientation is also not recommended, as it can allow water to pool on top of the seals - even if sealed properly, that is a big no-no.

In my opinion, this is a physical routing/retention issue, not a connector issue. That connection has been around for a long time and its properties are well-known and tried-and-true. It seals well and is perfectly capable of handling the Uly's stator output (or any other Buell, for that matter).

On my '08 Uly, that connection is no longer in the same place. I'm not sure if they use a different connector now or not as the voltage regulator now feeds into the left side of the case and any connection is made inside the primary. Since I'm not about to crack that open just to be sure, this little bit of the puzzle remains a mystery to me.

(Message edited by darthane on September 22, 2008)
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Electraglider_1997
Posted on Monday, September 22, 2008 - 09:03 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

LOCTITE GRAPHITE-50™ ANTI-SEIZE
METAL-FREE, electrically conductive, non-metallic. Temperature resistant up to 900°F (482°C). Highly electrically conductive in metal- to-metal joints.
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Buellrider11960
Posted on Monday, September 22, 2008 - 03:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

just had an issue w/mine voltage reg. fried,melted conn. seconday lock to main wire harness
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Tootal
Posted on Monday, September 22, 2008 - 08:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Pull the bulb out of a late model automotive tail light and you will see dielectric grease. It squeezes out of the way so you still get contact, it just doesn't corrode. Been using it for years with no ill effects.
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Red_chili
Posted on Tuesday, September 23, 2008 - 09:27 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I'm with Tootal. What it does is, prevents corrosion which leads to an ohmic connection.

I would be concerned about conductive grease; if it splooged between the conductors that could be a bad day? E_1997 is probably way more careful with application than I am!


I cleaned the connector (which did not look very dirty) and applied dielectric grease to it and all other connectors in the area, and my odd voltage readings straightened right up. I don't have that many miles on it so I don't have a long term report though.

(Message edited by Red_Chili on September 23, 2008)
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