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Old 11-09-2019, 05:23 PM   #1
Dirty Rick
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Default ECC

84 760
Electronic Climate Control
Is it a waste of time to try and get this functional?
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Old 11-10-2019, 04:26 PM   #2
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I really like climate control, but I don't what to try and polish a turd.

No ECC experience here?
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Old 11-10-2019, 04:29 PM   #3
VB242
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What is it doing or not doing? I had to replace the vacuum solenoid bank to get mine working correctly.
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Old 11-10-2019, 04:56 PM   #4
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Quote:
Originally Posted by Dirty Rick View Post
I don't what to try and polish a turd.
Yeah, already done.

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Old 11-11-2019, 12:28 AM   #5
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Quote:
Originally Posted by VB242 View Post
What is it doing or not doing? I had to replace the vacuum solenoid bank to get mine working correctly.
Were you able to find a new one?

This car did not have a water valve on it, after installing the water valve I don't see it opening or closing, no movement.
I believe the A/C did work but it has been hacked, pressure switch not in circuit.

Looking at the Green book
https://ozvolvo.org/archive/archive....lhZ3JhbXMucGRm

TP31075-1_760_wiring_diagrams.pdf Not sure this is even the right diagram?

Are there any other manuals I can snag for it?
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Old 11-11-2019, 09:01 AM   #6
VB242
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Quote:
Originally Posted by Dirty Rick View Post
Were you able to find a new one?

This car did not have a water valve on it, after installing the water valve I don't see it opening or closing, no movement.
I believe the A/C did work but it has been hacked, pressure switch not in circuit.

Looking at the Green book
https://ozvolvo.org/archive/archive....lhZ3JhbXMucGRm



TP31075-1_760_wiring_diagrams.pdf Not sure this is even the right diagram?

Are there any other manuals I can snag for it?
I got a used one from another member. Before I replaced it I could jury rig it by pushing against the electrical connector. Is the vacuum supply from the intake manifold hooked up and in good shape?
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Old 11-12-2019, 09:13 AM   #7
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Quote:
Originally Posted by Dirty Rick View Post
...

Are there any other manuals I can snag for it?
Look for TP 31127/1. Body fittings. Interior Climate units. Section 8(82-88)

Have the manual but no opinions or experience on the ECC or any 7-series. Read many folks' stories over the years about resoldering the power transistor in the ECC power stage like so many other "relay modules" needed. Possibly they are in the 7/9 FAQs.

I think the transistor just modulates the fan speed.
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