Download youself rave and look up the wiring diagram check theres power to the wires that should have it also whilst in there check for contact problems in the plug (corrosion, loose wire ect..)
 
There are two versions of the HEVAC unit, but that only affects whether an AC relay is required or not, based on year of car and all that.
 
The absolute bottom of the range dont have a lcd display it works by twist knobs and I think it pulls wires to move the flaps
 
So I found the wire that was to blame it was the auxiliary power supply one no1 on block c244 so now every think on the hevac works but now my fans still won't work all the blend motors are working because you can hear them justs no actual fans????
 
P38crazy said:
So I found the wire that was to blame it was the auxiliary power supply one no1 on block c244 so now every think on the hevac works but now my fans still won't work all the blend motors are working because you can hear them justs no actual fans????
Click to expand...
Check the fan fuses and relays.
 
​
gfromleeds said:
What was wrong with the power feed?
If it was a duff connection maybe the fan connection is faulty too?
Click to expand...

There was just no power feed to that connector for some reason but there was to the other to, the fans work if you put a direct feed to them but there isn't any power getting to them otherwise
 
P38crazy said:
There was just no power feed to that connector for some reason but there was to the other to, the fans work if you put a direct feed to them but there isn't any power getting to them otherwise
Click to expand...
So, it's the HEVAC or the connectors and wiring. Or duff relays/fuse box.
 
Last edited:
If you use all the existing wiring and put power in from the hevac plug?
That would rule out the wireing
 
So I've still now luck with my fans I got the hevac to work by putting a direct feed to the auxiliary power supply wire but not the fans I've tried different fans that I no work but my question is the auxiliary power feed from the loom to the hevac is showing minus rather than positive? And so is the blower control output wires? :frown:
 
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