HVAC unit
#1
HVAC unit
I have an '83 944 NA. It has AC. I am attempting to proceed with an extensive dash re-wiring. The dash and console are totally out of the car. It is my intention to use a later model relay and fuse board out of a later model car and install it where the glove box is now. Only the GB door will be retained. To do this, I have to extend all the wiring from the firewall around behind the HVAC center section. I have never removed this from the car previously. To do so would require draining all the 134A out of the system, which I am not wanting to do, right now as I don't have a recovery system for this. I can do this as far as a recharge goes, but I digress. So the question remains, if there enough room between the HVAC unit and the firewall to snake a bundle of wires behind it and run the bundle over to the glove box area? I don't really want to pull the HVAC unit out from the dash unless it's REALLY necessary...I guess that I'm lazy...but if I can avoid doing this it would be a major timesaver. The car, is pretty much unmoveable with the under dash wiring all melted..and is up on my quickjack. Many thanks in advance for ANY help.
#2
I'm just able to get my fat fingers into the space behind the HVAC. I've added a picture but as you can see this is a chopped unit which has been modified for use in my track car ('87 924s). Were you to 'ladder' your wiring on the hump/firewall you should be able to do so. This type of cable tie would help immensely.
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Tiger03447 (05-29-2023)
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Tiger03447 (05-29-2023)
#4
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Tiger03447 (05-29-2023)
#5
HVAC unit
Thanks for the info guys. I considered putting the fuse block where it was on the later cars, but didn’t know how they routed the wiring up to it. I really didn’t want to drill a giant hole in the area above my feet.. Water leakage? Perhaps they bypass that on the later cars somehow.? TIA😀
#6
HVAC unit
Interesting cable tie. Don’t think I’ve ever seen one like that before. Looks like it has a spot for a securing screw/bolt. More pics please? And maybe a source?TIA😀
#7
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#8
HVAC unit
Thanks for the input guys. Curtiss… if you would be so kind as to explain the term “ladder” that you used in the earlier post, I would be grateful. BTW does anyone have a source for automotive colored wire with a straight stripe like our Porsche wire has? I can find wire in plain colors and colored with spiral stripes, but none with a straight stripe. TIA😀
#9
I saw a 3-d printed applicator design somewhere, but any short piece of tubing slightly larger than the wire insulation diameter with a hole in it to apply paint from a paint pen you get from an art supply store will put a colored stripe down the wire as you pull it through the tubing. Just an idea (and one I will use someday.)
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Tiger03447 (06-01-2023)
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Tiger03447 (06-02-2023)
#14
For the wiring, I like Sherco. I use the marine grade stuff, which has thicker insulation that standard automotive wiring (TXL or GXL), but the selection of colors and stripes is great from those guys. Sometimes I have to step up a wire gauge to get the right color, but I'm OK with that.
Cheers
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Tiger03447 (06-02-2023)
#15
HVAC unit
Thanks for all the tips, guys. The paint tool deal really looks like a great way to go. I don’t know where to buy Porsche wire, so this looks like a nice workaround. I looked at Sherco and they have great stuff, but they use a spiral tracer wire, which is OK and I’ll probably wind up usuling that or perhaps something similar. Really do like the straight tracer, though. TIA😀