Grumpyhead123
Registered Member
The labels I placed on the lines on my 1991 Suburban heather vacuum lines came off and I need help figuring out where they go on the heater box. The heater box has two diaphragms, one with a single port and one with double ports.
The single port diaphragm seems simple enough because its at the far end of the box and the line is very short. My problem is where the lines go on the double and I marked them with a 1 & 2 in the first picture with the colored lines on the second picture.
Can anyone help with which lines go to which ports?
Thanks,
David


The single port diaphragm seems simple enough because its at the far end of the box and the line is very short. My problem is where the lines go on the double and I marked them with a 1 & 2 in the first picture with the colored lines on the second picture.
Can anyone help with which lines go to which ports?
Thanks,
David