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  #16  
Old 08-28-2017, 08:12 PM
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Quote:
Originally Posted by ROLLGUY View Post
You should probably read the entire thread, there are two problems. The draw on the battery is enough to kill it overnight. The problem with the AC, is there is no power to the pressure switch. I do know that the pushbutton unit is energizing the compressor relay like it should.
I did read the entire thread. What I was asking for was a number in amps for the significant draw, not just "it kills the battery overnight". Also, your AC compressor clutch not pulling in and the significant power draw are very likely 2 separate issues and unrelated.
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  #17  
Old 08-28-2017, 08:39 PM
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Originally Posted by funola View Post
I did read the entire thread. What I was asking for was a number in amps for the significant draw, not just "it kills the battery overnight". Also, your AC compressor clutch not pulling in and the significant power draw are very likely 2 separate issues and unrelated.
I don't know the number of amps, I only know that the draw is "significant" enough to kill the battery. That is good enough for me to know it is a problem.
Quote:
The compressor clutch only draws 1 to 2 amps max as I recall. Why do you think the compressor clutch has anything to do with the power draw? When the ign is off, there should be no draw from the climate control system.
I never said the climate control had anything to do with the power draw. They have always been two different problems, and I stated that in the opening post. That is why I assumed that you did not read the entire thread.
Quote:
With key on. did you try shorting out the pressure switch and did that actuate the compressor clutch?
Again, I have already stated that there is NO POWER on the wires going to the pressure switch, so shorting them is pointless.
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  #18  
Old 08-28-2017, 09:34 PM
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Originally Posted by ROLLGUY View Post
I don't know the number of amps, I only know that the draw is "significant" enough to kill the battery. That is good enough for me to know it is a problem.
I never said the climate control had anything to do with the power draw. They have always been two different problems, and I stated that in the opening post. That is why I assumed that you did not read the entire thread.

Again, I have already stated that there is NO POWER on the wires going to the pressure switch, so shorting them is pointless.
Electrical is easy for me. I asked for the amps draw as information so I can maybe help you since you said you don't know what to do next. I have no idea if you know or not know whether the two problems are unrelated or not since you put them both in the same thread. If you want to get testy about it, no more help from me. Good luck.
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  #19  
Old 08-28-2017, 09:46 PM
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Originally Posted by funola View Post
Electrical is easy for me. I asked for the amps draw as information so I can maybe help you since you said you don't know what to do next. I have no idea if you know or not know whether the two problems are unrelated or not since you put them both in the same thread. If you want to get testy about it, no more help from me. Good luck.
If I came across as being "testy", I did not mean to, sorry.
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  #20  
Old 08-29-2017, 11:05 AM
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Originally Posted by resto108 View Post
Compressor is relay D. Its right next to fuses 15 and c. Page 103 in the wiring diagram has the fusebox layout.
On this car there is only relays in A,B,E,F. There are blank holes for C&D. I believe the clutch relay is B on this car. If not, it is probably for the condenser fan.
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  #21  
Old 08-29-2017, 11:09 AM
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Originally Posted by SD Blue View Post
On the W126, power for the relay comes from 2 separate fuses. F18 powers the relay coil through the Pushbutton Controller and Pressure Switch. F11 then goes to the relay contacts and powers the clutch itself.

I tried to provide a link to the W126 diagram but they must be still having issues, or it is seeing heavy use at the moment.
Both fuses are good (12v on both ends).
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  #22  
Old 08-29-2017, 07:08 PM
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If you have no power at the A/C low-pressure switch, the problem is likely in the Pushbutton Controller.

When I had this problem, it was cracked solder joints internally. The unit had to be re-soldered where the circuit boards meet in an "H" pattern.
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  #23  
Old 08-30-2017, 12:45 AM
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Originally Posted by SD Blue View Post
If you have no power at the A/C low-pressure switch, the problem is likely in the Pushbutton Controller.

When I had this problem, it was cracked solder joints internally. The unit had to be re-soldered where the circuit boards meet in an "H" pattern.
That is odd, I literally tried 7+ PBU's (I have a stash of them) and all did the same thing. The original one had "rebuilt" stickers on it. I put it back in thinking it was working properly.
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  #24  
Old 08-30-2017, 06:20 PM
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Sorry for the delay, Startek finally let me open the diagram pdf!

It's here on page 307: https://www.startekinfo.com/StarTek/outside/12253/program/ETM/ACC83-85.pdf
The Pushbutton Controller powers the Evap. Temp Regulator and then the Compressor Relay. The Compressor Relay engages to power the Low Pressure Cut-out and then the Compressor Clutch.

BTW, ensure you are looking at the correct diagram as there are three different set-ups for this. Also, the Compressor Relay for this model is Relay J. (If you are looking at the Fuse Box, fuses to the left, it will be in the third column of relays from the left and closest to you.
Page 103 shows it here:
https://www.startekinfo.com/StarTek/outside/12253/program/ETM/126td83-85.pdf

IIRC, there was an incident where someone has experienced an overnight power drain from the power antenna. I don't recall if you've checked this or not, but another place to look for that problem.
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  #25  
Old 08-30-2017, 11:25 PM
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Quote:
Originally Posted by SD Blue View Post
Sorry for the delay, Startek finally let me open the diagram pdf!

It's here on page 307: https://www.startekinfo.com/StarTek/outside/12253/program/ETM/ACC83-85.pdf
The Pushbutton Controller powers the Evap. Temp Regulator and then the Compressor Relay. The Compressor Relay engages to power the Low Pressure Cut-out and then the Compressor Clutch.

BTW, ensure you are looking at the correct diagram as there are three different set-ups for this. Also, the Compressor Relay for this model is Relay J. (If you are looking at the Fuse Box, fuses to the left, it will be in the third column of relays from the left and closest to you.
Page 103 shows it here:
https://www.startekinfo.com/StarTek/outside/12253/program/ETM/126td83-85.pdf

IIRC, there was an incident where someone has experienced an overnight power drain from the power antenna. I don't recall if you've checked this or not, but another place to look for that problem.
Thanks for the info. Although I don't have the car anymore, I will pass this info on to the car owner. The car is 80+ miles from me, so I doubt he will be back for any repairs. He is having a local guy look at it. I have not checked the antenna, but would it not be fused? Pulling every fuse one at a time still showed a draw. Thanks again, Rich
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  #26  
Old 08-31-2017, 02:50 AM
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I believe that the glow plug relay can stick in the on position, and thereby cause the battery to be drained in fairly short order.
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  #27  
Old 08-31-2017, 01:42 PM
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Quote:
Originally Posted by SD Blue View Post
Sorry for the delay, Startek finally let me open the diagram pdf!

It's here on page 307: https://www.startekinfo.com/StarTek/outside/12253/program/ETM/ACC83-85.pdf
The Pushbutton Controller powers the Evap. Temp Regulator and then the Compressor Relay. The Compressor Relay engages to power the Low Pressure Cut-out and then the Compressor Clutch.

BTW, ensure you are looking at the correct diagram as there are three different set-ups for this. Also, the Compressor Relay for this model is Relay J. (If you are looking at the Fuse Box, fuses to the left, it will be in the third column of relays from the left and closest to you.
Page 103 shows it here:
https://www.startekinfo.com/StarTek/outside/12253/program/ETM/126td83-85.pdf

IIRC, there was an incident where someone has experienced an overnight power drain from the power antenna. I don't recall if you've checked this or not, but another place to look for that problem.

Speaking of looking at the correct diagram, the one you attached is for an 85, which has a different fusebox arrangement. I stand by my earlier post that its relay D.
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  #28  
Old 08-31-2017, 02:43 PM
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In trying to find out why no power at the compressor, I assumed that the relay I was working with was for the compressor clutch. It turned out to be the condenser fan relay. Resto 108- there was no relay in position D. I should have taken a photo when the car was here. Either way, I think the problem is with the ETR. I switched all the relays around, and the problem was still there.
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