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        General >> Problems >> Faulty HBC??
        
(Message started by: Brad. on Dec 22^nd, 2007, 11:11pm)

Title: Faulty HBC??
Post by Brad. on Dec 22^nd, 2007, 11:11pm

Hi Everyone.

I'd really appreciate someone's help before I start spending the little money I have on something that may not be faulty.

I recently bought a Scorpio Ultima 2.0L
The heater blower didn't work at all which, in the end, turned out to be a loose connection (easy).
The problem is that now the heater blower doesn't switch off at all, even in any switch position. The heater blower fan seems to be stuck ON and runs at the same speed throughout.

Any thoughts? I just hope the HBC is not faulty.

The other problem is that the drivers door lock will lock all the doors but will not unlock them. I have to unlock from the passenger door. I managed recently to get the remote key fob working and it locks/unlocks all the doors BUT, it would be good to get the drivers door lock working properly again. Any thoughts on that one?

Any help would be greatly appreciated so as to keep costs right down.
Cheers.
Brad.

Title: Re: Faulty HBC??
Post by Tompion on Dec 22^nd, 2007, 11:23pm

Hi & welcome to the site.

Sounds like it could just be a loose ribbon cable behind the climate control.

You probably need a new door lock or a kit to rebuild it.
When worn they will lock but not unlock – any Ford key of this type will lock them.

Title: Re: Faulty HBC??
Post by Brad. on Dec 23^rd, 2007, 10:36am

Hi, many thanks for your reply.

I'll check out the ribbon cable on the control panel a.s.a.p.

Regarding the faulty door lock, would you be referring to the lock mechanism or the barrel?
I've noticed an article on this site where someone rebuilds the door barrel assembly, would that be the way to solve my problem? If so, I can get a barrel kit and have a go at rebuilding the door lock.
Cheers.
Brad

Title: Re: Faulty HBC??
Post by Baz on Dec 23^rd, 2007, 11:58am

Brad,

welcome to the site.

There is a kit available from Fords which will enable you to rebuild the lock. A few members have done this and it appears to be a good way to solve locking/unlocking problems with the key

Baz

Title: Re: Faulty HBC??
Post by Brad. on Dec 23^rd, 2007, 3:31pm

Okay, I tried checking the ribbon cable out at the back of the CC control panel and it looks okay, obviously I can't get to the other end of the cable as it disappears inside the dash. But the heater blower fan still doesn't turn off when switched to the off position and runs all the time and at the same low speed.
I tested the voltage going in and out of the HBC and everything seems well there. I pulled the white/blue wire off the top of the HBC and the fan motor still remains on. Any ideas?

Regarding the door lock, I found it interesting that the door will lock and unlock properly with the 'red' key but not the two normal keys. Could this problem be just worn keys? As I said, the remote key fob locks/unlocks all the doors ok, its just the problem with unlocking the drivers door with the key.
Cheers again.
Brad.

Title: Re: Faulty HBC??
Post by pedropedro on Dec 23^rd, 2007, 4:35pm

if the voltages from the cc unit swing 0-5v with fan speed control and if you pull those two wires the HBC is shorted ..only remedy is to replace it
john

Title: Re: Faulty HBC??
Post by ren on Dec 23^rd, 2007, 4:35pm

Hi
As said in a previous reply all Ford Keys will lock
Ford cars,only correct Keys will unlock.
Its possible the Keys u have are not the same
Keys for the barrel,so they will not unlock.
hence u will need to change the barrel.
hth
ren

Title: Re: Faulty HBC??
Post by Tompion on Dec 23^rd, 2007, 4:48pm

I think the other end of the ribbon is hard wired. Did you unplug it to see if the fan speed stayed the same (it will run at low speed with the ribbon disconnected or not connected properly). Push the ribbon in and make sure the side latches are locked.

Title: Re: Faulty HBC??
Post by pistonbroke on Dec 23^rd, 2007, 9:40pm

on 12/23/07 at 16:35:49, ren wrote:

Nearly right Ren. All bets are off when stuff gets worn in my book - I'm not going to say what I've seen with my own eyes :o

If you're seeing signs of worn locks then better to change them using the kit Baz mentions ;)

Dave

ps. Ren - met you at Derby a long time ago, glad to see that you did get corrupted into the ways of the 24v }{

Title: Re: Faulty HBC??
Post by Brad. on Jan 3^rd, 2008, 12:43pm

Hi all.
Right then, new developments !!!!
I managed to replace the Climate Control Panel on the dash. Although both LCD displays now work, the original problem still exists, namely that the heater blower fan is on all the time. Surely, the fan should go off when the control is in the off position.
The fan also runs at the same speed all the time.
As the car runs very quitely, it would be nice for the fan to be switched off when not needed.
So, can I safely assume now that the Heater Blower Control is faulty?
Brad.

Title: Re: Faulty HBC??
Post by Snoopy on Jan 3^rd, 2008, 1:55pm

If the let hand control is in th " auto" position the fan is running all the time by default.

If it still runs with the knob turned to "off" the displays should go to "- -" and the fan should be off.

Does the knob turn the fan speed up and down when turned to the right and left?

Title: Re: Faulty HBC??
Post by Brad. on Jan 3^rd, 2008, 6:08pm

Hi,
The fan runs all the time, at the same speed, regardless of any switch position on any switch. The fan comes on straight away when you turn the ignition key to II.

Pressing the Recir or A/C buttons doesn't alter the fan speed either.

When the CC switch is turned off, the display's do indeed go to "- -" but the fan still runs.
When switched to "Auto", both displays show the temperatures correctly, can be adjusted and does actually change the temperature in the car very well.

When switched to "manual", the fan still stays on but at the same speed and regardless of wheither the switch is "fully on" or turned right down to the left.

So, could I assume that the CC panel is okay and that the heater blower control is faulty?

Title: Re: Faulty HBC??
Post by Brad. on Jan 3^rd, 2008, 6:16pm

Just a quick thought ..... I noticed that the WHITE/BLUE & BROWN/BLUE wire on top of the HBC seems strange. Can I assume that BOTH wires should be connected to the HBC ? The one thats on the car the BROWN/BLUE wire missing where it comes out of the connector just before the connector on the HBC. the wire is a short bit about 2" long with a connector on each end. The BROWN/BLUE wire seems as though it is "made that way" rather than cut off.
Seems logical that this wire should have both wires connected to the HBC !
Cheers.
Brad.

Title: Re: Faulty HBC??
Post by Tompion on Jan 3^rd, 2008, 9:49pm

Can't go and look at the moment,
but if I remember correctly 3 plugs with 2 wires to each.

Testing here:
http://www.fordscorpio.co.uk/hbctest.htm

Wiring diagrams here (it is for Scorpio even though it says Sierra):

http://www.carsoft.ru/avtorepair/sierra_el.html

Title: Re: Faulty HBC??
Post by scorpio_man on Jan 4^th, 2008, 3:44pm

hi there

i seem to remember someone saying that there's a small pot on the panel that you can turn slightly so that the on/off/auto dial works correctly.

i take it you can't do a reset (http://www.fordscorpio.co.uk/ccreset.htm)on it because BOTH displays don't have -- showing when the dials are set to the left?

hth

Title: Re: Faulty HBC??
Post by Brad. on Jan 4^th, 2008, 8:03pm

Did a reset because I replaced the Climate Control Panel and had to set the panel up following the CC reset section on this website. As I say, the displays appear to work correctly and the heat is adjustable. It is just that the fan is on all the time, regardless of switch position, and the fan runs at the same speed, again regardless of switch position.

I think I'll replace the twin cable (WHITE/BLUE & BROWN/BLUE) and see if that cures the problem, at least it is cheaper than a new HBC !!!!!!.
Brad.