What are these?

[CK5]

Before I start a voyage to find out where these 3 lines go, any ideas?
They look like vacuum lines?

This is on my 72 Blazer that now has a TBI 350. They are coming out of the firewall just to the right side of the motor.

 

[GWeakland620]

Aren’t those for HVAC controls? Blend door, mode door…

 

[CK5]

Aren’t those for HVAC controls? Blend door, mode door…

What I was thinking too but haven't crawled under the dash to look yet.

 

[sweetk30]

do you have a hvac blazer ?

and the 3 lines are not hooked up now so they do nothing .

 

[CK5]

do you have a hvac blazer ?

and the 3 lines are not hooked up now so they do nothing .

Original non AC body. I haven't looked under the dash yet to see if they are hooked up to anything.

 

[GWeakland620]

You’d still have vacuum lines for a blend and mode door.

 

[6872xtc]

Those are for the windshield washer.
One line from the reservoir, 2 out to the nozzles. The original pump is on the wiper motor, under the dash.
I believe that this is the driver side of the engine and the wires below are the ones going to the taillights.

 

[6872xtc]

Picture of a '69 C10. The big block hides things a little bit.

 

[CK5]

Picture of a '69 C10. The big block hides things a little bit. View attachment 520052

Excellent, I will take a look at that thanks!
This site is amazing!

 

[CK5]

Picture of a '69 C10. The big block hides things a little bit. View attachment 520052

I will have to revisit this after I replace the coil and all the other crap I find. My washer stuff is setup different and appears to have been changed over the years.

 

[6872xtc]

I will have to revisit this after I replace the coil and all the other crap I find. My washer stuff is setup different and appears to have been changed over the years.

Yep, good chance that it has been changed to an electric pump. I did on my '70 and there used to be small inline pumps available at the parts stores.

 

[CK5]

Yep, good chance that it has been changed to an electric pump. I did on my '70 and there used to be small inline pumps available at the parts stores.

Looks like a small elec motor under the reservoir.