Electrical Question

[Russell]

I found a burnt connector on the AC Fan relay. The burnt connector is on a wire that has a fusible link. Does this appear to be just a problem with
the connector, which is an easy fix, or is it a symptom of a deeper problem?

http://www.gmcmhphotos.com/photos/data/7175/Burnt_Connector_on_AC_Fan_Relay.jpg

More pictures here:
http://www.gmcmhphotos.com/photos/g7175-electrical-challenge.html
--
Russell Keith,
1978 Eleganza II "Harry" 403, Danny Dunn Tranny (w/shift kit, 3.50 sprockets, Allison), Thorley, Stock Brakes w/Remote Vacuum Brake Booster, Dakota
Digital Dash, 6.5kW Onan, Dunedin, Florida

 

[roy keen]

Looks like it is just a bad connection in the connector lug. I would cut the bad part off the wire and install a new connector terminal.
--
Roy Keen
Minden,NV
76 X Glenbrook

 

[emerystora]

That is a common problem. The fan draws a lot of current and the terminal often gets some corrosion and overhears. Put som dielectric grease on the terminal after you install a new terminal.

Emery Stora

>
> Looks like it is just a bad connection in the connector lug. I would cut the bad part off the wire and install a new connector terminal.
> --
> Roy Keen
> Minden,NV
> 76 X Glenbrook
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[jim kanomata1]

Also crimp the connectors as loose connectors always heat up.

On Sat, Aug 18, 2018 at 7:04 PM, Emery Stora via Gmclist <

> That is a common problem. The fan draws a lot of current and the terminal
> often gets some corrosion and overhears. Put som dielectric grease on the
> terminal after you install a new terminal.
>
> Emery Stora
>

> >
> > Looks like it is just a bad connection in the connector lug. I would cut
> the bad part off the wire and install a new connector terminal.
> > --
> > Roy Keen
> > Minden,NV
> > 76 X Glenbrook
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[Russell]

Thank you for the replies. I'll crimp on a new connector, and use some dielectric grease on the connection.
--
Russell Keith,
1978 Eleganza II "Harry" 403, Danny Dunn Tranny (w/shift kit, 3.50 sprockets, Allison), Thorley, Stock Brakes w/Remote Vacuum Brake Booster, Dakota
Digital Dash, 6.5kW Onan, Dunedin, Florida

 

[Ken B]

> Thank you for the replies. I'll crimp on a new connector, and use some dielectric grease on the connection.

If it were me I would use some anti-oxidation grease available at Lowers, Home Depot, Memards, or your local hardware store in the electrical
section.

Dielectric anything is by definition non-conductive. Anti-oxidation grease is designed for electrical connections. In a pinch I would even use
copper or nickel based anti-seize.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

 

[john r. lebetski]

The OEM fail was at the connector to relay. Your repair was a bad crimp job fail. The heat was at wire to crimp, not crimp to relay. Once properly
repaired, I have recommended Caig D5 spray for such connections to help break the oxidation. In later years GM went to weatherpak connectors which
proved more reliable as they stayed clean longer.
--
John Lebetski
Woodstock, IL
77 Eleganza II

 

[emerystora]

Use of greases in connection protection seems to be a controversial topic.

The most frequent Internet complaint is that dielectric grease insulates connections, making connections less conductive. Some call pure silicone grease an "insulating grease". The general basis for this claim is in the word "dielectric" used in the name. The word dielectric is assumed to mean the connection will have future problems because "dielectrics" are insulators. Generally, authors predict greases with powdered metal (in slang "conductive greases") will improve or maintain connection quality over time while dielectric greases will isolate connections because "that is what dielectrics do". All of these dielectric greases both improve insulation and preserve electrical connections. They do this by sealing contaminants, moisture, and air out of connections. They are as effective at preserving connections as “conductive” grease, and will not harm insulation. You can find many references to this if one checks “dielectric grease” on google.

Emery Stora
77 Kingsley
Frederick, CO

>

>> Thank you for the replies. I'll crimp on a new connector, and use some dielectric grease on the connection.
>
>
> If it were me I would use some anti-oxidation grease available at Lowers, Home Depot, Memards, or your local hardware store in the electrical
> section.
>
> Dielectric anything is by definition non-conductive. Anti-oxidation grease is designed for electrical connections. In a pinch I would even use
> copper or nickel based anti-seize.
> --
> Ken Burton - N9KB
>