2001 Ram Diesel...

I know what the problem is..

Pump is fine, plenty of vacuum at the firewall(engine side)...Its not making it to the switch though..So obviously I have a break in that line...Problem is that it looks like that line disappears behind the heater box...Is there a junction point somewhere thats accessible without taking the truck apart.??. I did find the connector under the drivers side of the dash..No vacuum there as well..

Right now its just defaulting to defrost..Im assuming the best fix for this is to run a new line back out to the engine side. Just want to see if there is a way to do this without a jury rig job..

Thanks in advance...


NB