Wiring new Suburban furnace too many wires??

[pablobagus]

can anyone tell me why their aresix wires in the furnace location. two pairs are aluminium and one pair is copper. Which ones do i use. Old furnace was not connected so i have no idea and do not have wiring diagram for my new 67 safari internation.....

[tkasten]

I installed a new Suburban NP30 2.5 years ago in my 65. My wiring is as follows:
Red to large Orange, Yellow to large White ( these are the 12v and ground), the 2 blues go to the smaller white & black (these should be the thermostat). Not sure if this is perfect but mine works.

[Splitrock]

Mine only has 4 wires.

[pablobagus]

i have six wires coming from trailer furnace wall location, can any tell me which four to use. 2 are copper and 4 are aluminium. There are three holes in the wall for each pair, if i could only find out which are which from this location.....

[Minno]

Do you have a picture of the wires in question? Also, do you own a multimeter or have a 12 volt test light? Just a guess, but if the copper wires are larger gauge than the aluminum ones, the copper wires are probably 12 VDC and ground/return. The aluminum ones might be the thermostat. But that's a wild guess without seeing them or doing some testing.

Chris

[Splitrock]

My trailer had one hot/ground pair used for the range, one hot/ground pair for the heater, and one pair for the thermostat. A jumper light, and one multi-meter is all that's needed to identify what's what.

[pablobagus]

thanks for the replies guys. learning so many things at once is a challenge and a lot of fun. Chris, I will post pic in the morning and hopefully you could let me know what you think. I think the thermo wires are not an issue, its the other four that concern me.

thanks again....