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Old 10-29-2010, 07:58 PM   #1
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HVAC thick green wire? blower switch

What is the thick green wire on the blower motor switch? I'm thinking ground, but it's not attached to anything and cut about 10 inches up. Is it supposed to splice in with another wire like the vacuum ground wire?

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Old 10-29-2010, 09:21 PM   #2
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Okay, so the green wire is the input wire going to the speed selector switch. I'm assuming, the selector connects it with one of the other options (High, M2, M1, Low) and that signal is jumped. However where does the remaineder of the wiring harness go?

And on the 3-spade connection on the vacuum line, what are the wires going to the spades? Here's a pic of mine. The thick yellow one is the middle is clearly the blower motor resistor. The green 'input' wire is now cut so I don't know if that is the same wire that goes to the center spade. The left appears to be a ground, and I'm guessing hte small green wire is power? Can anyone confirm this?


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Old 10-29-2010, 09:48 PM   #3
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Yikes, I remember that pic. The 3 wires on the back of that switch are: fan relay (12 gauge), ground (12 gauge), and light green 16 gauge is a/c control. Those are the only wires on the back of that switch. I don't have my FSM with me, but I don't think the resistor is wired to that switch. The connector for that switch is discontinued, I had to splice.
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Old 10-29-2010, 10:15 PM   #4
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yea and it hasn't changed since you last saw that pic,

I have the FSM but there is no wiring diagram of what the wires do or go to. The way mine looked is that the person wired the input switch to the blower resistor through the middle vacuum space.
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Old 10-29-2010, 11:06 PM   #5
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There is a section in the back of the FSM that does tell where the wiring goes, but if you're not familiar with automotive electrical symbols (which I'm not), it can be very confusing. They use abreviations for color, but you can usually figure it out. When you're looking at the hvac section, the switches are numbered. When you check the wiring schematic in the back, you have to reference the switch #, etc. Sound confusing ? It is good luck, it is in there.
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Old 10-30-2010, 12:51 AM   #6
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Oh god, I found that page. Now my head hurts haha. Any clue where that "input" solid green wire is supposed to go? You're saying the center thick wire (mine has been changed to yellow) is supposed to go to the fan relay? Or is that thick green wire SUPPOSED to be the one attached to is that goes to the blower control?

In any case, my blower control switch was fried. Literally crumbled in my hand when I cracked it open. I'm ordering both the blower control and the vacuum control tomorrow because both are shot completely.

What I need specifically to figure out is where does that "input" wire on the blower control go to. Mine was previously spliced to the center prong on the vacuum control. And where is that center prong supposed to be wired to? Mine goes down towards the resistor underneath the passenger airbag, and is spliced into a connection. I can confirm completely tomorrow.
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Old 10-30-2010, 12:01 PM   #7
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bump ttt for some help
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Old 10-30-2010, 12:59 PM   #8
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My jeep and FSM are in the desert so I can't reference them. In the hvac section of the FSM get the # of the fan switch, # of the resistor, and # of the climate mode switch. Go to the electrical section. Reference the switch #'s with the electric schematics. It will tell you what color wires go on which tabs. Kinda like reading heiroglyphics but it's in there.
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Old 10-30-2010, 01:04 PM   #9
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I could be wrong, but I believe it goes to the blower relay. Here's a pic of the relay...



...The green & red/greed carry the load to the blower. The black is ground & the blue powers the relay
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Old 11-06-2010, 03:41 PM   #10
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Can someone take a picture of the back of their HVAC panel for me please? I'm trying to get this all wired up and nothing is working at all The switches are all brand new. The wiring looks to be wired as it was before, and now I can't even get the damn blower motor to work. I can't for the life of me figure out the FSM diagram. And can someone let me know where that green wire that is the "input" for the blower motor switch goes to? Mine is cut about five inches down and there appears NOTHING it would connect to. I'm completely at a loss.

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