Factory A/C & Heater Help

[mrein3]

Originally Posted by big dump

BTW, anyone know of any good online places to get wire pigtails for older style switches like in our trucks? i.e. 4 pin A/C control switch, 2 pin Compressor clutch, etc. I'd like to put all new connectors on these and would prefer to use factory style rather than just spade connectors and electrical tape.

Here is what I would do (and actually did do a few years ago):
First I ordered a new switch and a new plastic connector for the back of the switch from LMC. Folks here hate LMC. If you don't like them find a board sponsor and see if they carry these pieces. I didn't have to order the 2-pin compressor connector so I don't know if they are available. If not just go to the junk yard and clip one off a donor. Then go to NAPA and order "type 56" connectors. At NAPA they won't know what you are talking about so just tell them you want 20 or so pieces of part number 725147. The male side of that connector is 725145. You may as well grab some of those too. Buy extras because most of the connectors in your truck have this brass colored insert for the actual connection. I keep a handfull of both around my shop. Then go to Lowe's, Home Depot, Menard's, your local hardware store, where ever and purchase spools of the correct color wire.

Once you got all that stuff just make your own wires. Notice the wiring diagram jayharrell posted. It tells you exactly what color and gauge of wire you need. If you didn't know, 14Y = 14 gauge yellow. 14DBL = 14 gauge dark blue, etc.

I hope this helps.