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New PSE stopped locking

1494 Views 11 Replies 5 Participants Last post by  bayhas
Its the same tired old story, it stopped opening the trunk handle yesturday & the door locks today. I simply pulled out the fuse until i can figure it out.
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I think the info is incorrect. I got a '92 500SEL.
PSE (Under the right rear seat) does Trunk handle, lumbar, AC, central locking, reverse antenna, ...
Closing Assist Pump (in boot, behing passenger seat on left, beside tank) does that: closing assist, nithing else.

exactly nubyOz. no burnt fuses.:confused:

door assist works as it should, but I heard a burbling under the boot latch near ext lock the day before the pse quit, i guessing vaccum hoses as a possible suspect.
Thanks Gents. i have Monday off & will take a closer look.
I ran a series of tests all the power points to the pse but nothing works.

I swapped the new pump motor (bosch)into the old hella pse unit & it ran, but didnt make anything work. (I did try the motor's wires in both directions)

Then replaced the pump motor back into the new bosch unit & it bolstered my seat for a fraction of a second & shut off not to work again.

Again no burnt fuses no smell, nothing.

I checked the motor & pump again to see if it failed & its ok, & works fine.

I'm almost convinced the circuit board and/or electronics failed on the new unit after less than one year of service...what a rip.

I'm going to ask autohaus AZ (bought from) if they can give me another one at a reduced price.

The only thing i didnt do is put the pse into another w140 to see if its my vaccum lines as suspect.
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I am not sure if I missed something, but did you buy a new pump and take it apart?

The brand-new pse was in my car & failed after only one year. That includes being in climate-controlled storage for six months.

I would like something that works at least a couple of years minimum for 309$ plus shipping:rolleyes:
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