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  #1  
Old 06-26-2012, 03:55 PM
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Location: Fairbanks Alaska
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Elect. Vac motor in trunk

yep, no door locks pulled the elect. vac motor from the truck and tested. Hooked 12v and a ground to the main (red & brown) wires, no luck. Pulled the PCB out and applied 12v down stream of the PCB ( see pic) still, the motor didn't turn. also pulled the top off the pump, all vanes slid in and out fine, nothing was jammed up )
Is there a fix for this, after market? any one know what the replacement cost is?

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Elect. Vac motor in trunk-img_1603.jpg  
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Old 06-26-2012, 08:49 PM
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Quote:
Originally Posted by Scottr View Post
yep, no door locks pulled the elect. vac motor from the truck and tested. Hooked 12v and a ground to the main (red & brown) wires, no luck. Pulled the PCB out and applied 12v down stream of the PCB ( see pic) still, the motor didn't turn. also pulled the top off the pump, all vanes slid in and out fine, nothing was jammed up )
Is there a fix for this, after market? any one know what the replacement cost is?
Take a look on eBay they frequently sell used and new ones.

Do you think this is another worn Brushes issue?

A different vehicle and lock setup but below is what I did; I lost my original Check Valve and used a generic one:

Electric Vacuum Pump for the Door Locks
http://www.peachparts.com/shopforum/diesel-discussion/320381-add-electric-vacuum-pump-w123-locking-system.html
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Old 06-26-2012, 09:10 PM
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911, thanks for the insight, I didn't pull the motor from the plastic housing, seems rubber mounted with one way gromets. I may have to look that over again, I assume by your comment that the brushes on these pumps are prone to fail / wear out. Do you know if the brushes are avalible for rebiuld? I'll also start looking on ebay.

Thanks again
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Old 06-26-2012, 09:19 PM
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Sarcastic

Or, perhaps just get some padlocks and screw in some hasps on each door. Tacky but effective!

Sorry, I say this out of my own frustration with my door locks as well.
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Old 06-26-2012, 09:39 PM
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Indy, I'll stick with a correct fix for now, however, I'll keep your method in mind should things get real bad.
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Old 06-26-2012, 11:42 PM
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Originally Posted by Scottr View Post
911, thanks for the insight, I didn't pull the motor from the plastic housing, seems rubber mounted with one way gromets. I may have to look that over again, I assume by your comment that the brushes on these pumps are prone to fail / wear out. Do you know if the brushes are avalible for rebiuld? I'll also start looking on ebay.

Thanks again
I did not mean to imply that I had any special Knowledge about your Vacuum Pump. Yours is the first thread that I have read of anyone having one go dead.

I was just speculating on what would cause the Motor not to turn.

When My Blower Motor stopped turning I went in to look at the Brushes and found that one of the Connections to the Brush had corroded. It just took a little Solder to restore the circuit and get the Motor going.
So you just do not know until you take a look.

I have only seen the tiny little pics on eBay of the Motors like yours. I don't know if the Brushes are accessible.
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Old 06-27-2012, 11:20 AM
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Understood, thanks 911
I'll continue trouble shooting the system, this is a good challange. i did look on ebay, found many pumps, different years and models, will have to further pursue what I can cross over if I can't fix mine.
here's a pic of the vane style pump thats used for anyone who has not pulled theirs apart.
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Elect. Vac motor in trunk-img_1606.jpg  
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  #8  
Old 06-27-2012, 03:12 PM
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Quote:
Originally Posted by Scottr View Post
yep, no door locks pulled the elect. vac motor from the truck and tested. Hooked 12v and a ground to the main (red & brown) wires, no luck. Pulled the PCB out and applied 12v down stream of the PCB ( see pic) still, the motor didn't turn. also pulled the top off the pump, all vanes slid in and out fine, nothing was jammed up )
Is there a fix for this, after market? any one know what the replacement cost is?
What car is this off of?
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Old 06-27-2012, 03:41 PM
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1985 300SD 129K ( confirmed )
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Old 06-28-2012, 12:41 AM
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There are a lot of these pumps in the 126, 124 and 201 models in the PNP`s. would the other model pumps fit and work? might be cheaper to pull one and with shipping than getting one off e-bay. though Iam not sure what PNP charges.

Charlie

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