I'll give you $500 for it.
Luther KB5QHUForest Park, IL
'98 ML320 "Max" (168,xxx mi)
On 7/13/2013 9:40 PM, Kaleb C. Striplin wrote:
I had one clutch fail, but have had many klimas fail. This one has me baffled.
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That is what I would say.
Check the ground wire for the PBCU -- no ground = no operation. I'd
suspect the wiring on that age car though -- 95 was right in the
middle of the magical disintegrating insulation period. Every wire in
the car is subject to that problem, not just the engine harn
So I ran a test wire from the plug on pressure switch to ground and compressor
started up. So we either have a wiring issue to the pbu or a bunch of bad pbu's?
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On Jul 14, 2013, at 8:09 AM, Peter Frederick wrote:
> Jumpeingr 5 and 7 is what the relay does, so your compressor
More than one circuit in there, you can lose one but not the others, I
think.
Good luck, I hate tracing down automotive electrical problems!
One last thought -- make sure the ground at the PBCU is good
Peter
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For new and used
If the ovp relay was bad you would also not have any tach or electronic idle
control, correct?
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On Jul 14, 2013, at 8:09 AM, Peter Frederick wrote:
> Jumpeingr 5 and 7 is what the relay does, so your compressor is good and the
> clutch coil conducts enough to at least spin
Jumpeingr 5 and 7 is what the relay does, so your compressor is good
and the clutch coil conducts enough to at least spin it, but that does
not mean the KLIMA is good.
As I said, the PBCU switches on the compressor by grounding the wire
from the low pressure cutout switch, so if the KLIMA i
Ps with the wire jumpers between 5 and 7 at the Klima compressor runs.
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On Jul 13, 2013, at 10:55 PM, Peter Frederick wrote:
> You might try grounding the low pressure switch wire that goes to the KLIMA
> with the engine running. This should engage the compressor if the KLI
I will give that a try tomorrow. If it runs I assume it indicates what? The pbu
or wire between it and the switch is bad or wire to Klima is bad or what?
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On Jul 13, 2013, at 10:55 PM, Peter Frederick wrote:
> You might try grounding the low pressure switch wire that goes to
You might try grounding the low pressure switch wire that goes to the
KLIMA with the engine running. This should engage the compressor if
the KLIMA is good as the only signal to the KLIMA from the PBCU is a
ground. If it does not come on, there is something wrong with the
KLIMA or circuit
I was something online about a failed Klima, having a couple of small relays
inside the box, remove the cover and clean the contacts. I pulled the cover off
this one and I do not see anything that looks like mini relays, it's all
computer circuit.
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On Jul 13, 2013, at 9:36 P
I had one clutch fail, but have had many klimas fail. This one has me baffled.
Sent from my iPhone
On Jul 13, 2013, at 8:59 PM, Dieselhead <126die...@gmail.com> wrote:
>> The KLIMA Is probably bad -- the signal goes from the PBCU to the KLIMA to
>> the low pressure switch on the receiver/dryer
I checked for cont between the switch and pin 10 of Klima, it was good, pin 1
and ground, it was good, switch and pin 7 I believe of pbu it was good. Pin 13
at pbu is power I believe, if I put positive there and neg pin 7 I show less
than a volt, like .6 or something. I even ran a test wire dire
I've only seen one failed KLIMA so far, but it was in the car where
the clutch coil shorted. Burned the internal relay contacts. They
can also start to leak and get corroded, but failure is no more common
than other failures in MB relays.
Peter
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htt
The KLIMA Is probably bad -- the signal goes from the PBCU to the
KLIMA to the low pressure switch on the receiver/dryer. If the
KLIMA relay has burned contact, it won't switch the compressor on no
matter what you do as the clutch current goes only through that
relay contact set.
Check the r
The PBCU provides a ground to the voltage signal, so I suspect you
don't have voltage at the switch due to a failed wire somewhere
between the battery and the pressure switch.
I almost forgot -- some engines are equipped with a wide open throttle
switch to disconnect the AC compressor at fu
I have also tried about or 5 different klimas also. One out of my other 95 and
several out of 2.5 that I know work in those cars but do have the 12th pin for
temp sensor cutout that the 95 does not. I pulled the Klima apart and I do not
see anything that appears burned. In prep for the test it s
The KLIMA Is probably bad -- the signal goes from the PBCU to the
KLIMA to the low pressure switch on the receiver/dryer. If the KLIMA
relay has burned contact, it won't switch the compressor on no matter
what you do as the clutch current goes only through that relay contact
set.
Check t
I have been jacking around with this 95 e300 for a couple of weeks. Ac is
charged and compressor kicks in when 5 and 7 at Klima are jumped. I have run
thru test in manual and my suspect is pbu not working because I am not getting
12 volts at the pressure switch or what is it pin 10 on tr Klima?
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