| Re: [GMCnet] What I found out about my LP gauge/wiring [message #316701 is a reply to message #316666] |
Thu, 27 April 2017 14:17   |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma:
|
Senior Member |
|
|
BobDunahugh wrote on Wed, 26 April 2017 23:23Gauge shows full all the time. Pushed the LP gauge switch. Had 12 volt on both the terminals on the back of the gauge. ( Both the red, and white wires are not connected to the tank sender. ) The white wire at the tank, But not connected to the tank sender. Is a true ground to the body. Next I need to engage the LP gauge switch to see what voltage I have at the red power wire at the tank. Shouldn't the voltage at the tank be lower? If I have power at the tank. Attach the ground to the ground terminal on the tank. It should work. If not. I need to check continuity in the sender. Bob Dunahugh 78 Royale
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Bob,
The 78 Royale utilizes a standard 0-90ohm balancing coil fuel gauge, There are three terminals on the back of the round 52mm (2 1/4") gauge. The one marked (+) is 12v power from the ignition switch source. The one marked (-) goes to the sending unit in the tank. The third one, usually located between and below the other two is a ground. (not usually marked) The ground at the gauge is essential if you want the gauge to work. Without it, the needle will deflect either full or empty (depending on how it is wired), with no in between deflection indicating fuel level. Check and make sure your gauge is wired properly.
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
