How is the blower motor connected

[VTP99]

04 Chevy Express 1500

Can someone please assist me with a blower motor electrical diagram.
Specifically the Orange wire from the resistor block.
I assume it goes to the HVAC control module.
Thanks in Advance

[MountainManJoe]

Welcome to the forum.

Orange wire goes to your control panel switch.
The website charm.li is an excellent source for wiring diagrams.
What's happening with your van?

[VTP99]

Sorry for the delay MMJ
I didn't receive any notifications on this.

I have no blower motor in any switch positions.
I believe my 07 has an electric selector ( damper position ) where as this 04 has vacuum.
How does it transition from a orange electric wire to a vacuum controller.
Is there a vacuum switch of some sort ?
Is it internal to the HVAC control ?
I'm thinking I can jump Brown #141 to White #119 @ the 8 pin connector of said control to test this.
Thanks for your assistance.

[MountainManJoe]

Blower motor control is all electric. No vacuum involved whatsoever.
First step is to check your fuses, and test your blower with 12V to make sure it works.

[VTP99]

Been there done that on both former and latter.
Blower runs if I jump red/black to orange at the resistor block.
Do you have a diagram of the 8 pin connector at the hvac control module ?
Additionally there's a jumper I circled in red that connects the electric to the vacuum assembly at the HVAC control module. At least that is how it appears on that diagram.

[MountainManJoe]

Blower runs if I jump red/black to orange at the resistor block.

So which of those wires has 12V on it ... RD/BK, or OG?

[VTP99]

Red/Black which starts at the 40amp fuse.

[MountainManJoe]

So according to the posted diagram ... the control panel gets its power on C2 (connector 2), pin E (5th from top left according to alphabet).
Do you have 12V there?

[VTP99]

I haven't checked that yet I've got to remove the dash panel again.
This is were my thinking was to jump across there to take the damper position out of the equation.

[MountainManJoe]

A multi-meter or test light is an essential tool for circuit diagnosis.
Wire color should be brown.

[VTP99]

Yes I agree and use my Fluke every day servicing commercial HVAC equipment.
A jumper is essential as well to bypass components that may be a problem.
I'll get back on this soon and post back my findings.
Again I appreciate your assistance.