| [GMCnet] NT-30M Furnace Wiring [message #221711] |
Sun, 08 September 2013 21:03 |
Jeff Marten
Messages: 199
Registered: August 2013
Karma:
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Senior Member |
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Still tracing out the wiring issue that is causing the furnace not to work. The manual shows two "T.H.-Blue" wires coming into the connecting harness: one combined with the red wire in position 1 (+12v) and the other by itself in position 3 of the connector.
Are these the two wires that go to the thermostat? If so, it looks like it just provides the +12v supply to the 3rd spot on the harness, so positions 1 & 3 will get +12v, the center yellow wire provides the ground. Assuming this, if I get no conductivity between positions 1 & 3 when the thermostat contacts are closed, there is a break in the thermostat wire(s) somewhere.
To test, I should be able to just jumper 1 & 3 and the furnace should run.
Thanks!
Jeff Marten
Colorado Springs, Co
1978 Royale
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1985 Gulf Stream 34' Sun Stream
1964 Falcon 'Vert
1980 Bradley GTE
1999 Chevy Tahoe
2005 Saab 93 Aero
1987 Suzuki Intruder 1400
1978 Glastron/Carlson CV23
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