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  #1  
Old 07-29-2012, 08:12 PM
vstech's Avatar
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Location: Mount Holly, NC
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87300 TD where are the control relays?

neither the seats, nor the windows, nor the blower have power, and the fuses are all good.
there must be relays in the car, but I haven't found them yet.
THANKS!!

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #2  
Old 07-29-2012, 08:51 PM
compu_85's Avatar
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Are those fuses getting power? I'd check the wiring diagrams

-J
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  #3  
Old 07-29-2012, 09:15 PM
vstech's Avatar
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yup. all fuses are getting and passing on power.
I'd love to have a diagram. I'll try to dig through the online FSM
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #4  
Old 07-29-2012, 09:47 PM
pwogaman's Avatar
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Seats should be K5 relay code A, windows should be K4 relay code F.

Also look at this thread: Convenience Relay Module 001-542-78-19, 0015427819, W0133-171526. Pictures of Repair
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  #5  
Old 07-30-2012, 01:40 AM
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The relays are in the fuse/relay box. Remove the fuse box lid then remove six (6) screws to loosen and remove the sub-lid which also covers the relays. The relays are in 3 rows. Lefthand row, all the way back, is Relay A, K5 Power Seats. Middle row, all the way back, Relay F, K4 Power Windows.
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Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
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  #6  
Old 07-30-2012, 07:02 AM
vstech's Avatar
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Thanks! I had a feeling they were there.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #7  
Old 07-30-2012, 10:10 AM
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Location: Germantown, TN
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Quote:
Originally Posted by Jeremy5848 View Post
The relays are in the fuse/relay box. Remove the fuse box lid then remove six (6) screws to loosen and remove the sub-lid which also covers the relays. The relays are in 3 rows. Lefthand row, all the way back, is Relay A, K5 Power Seats. Middle row, all the way back, Relay F, K4 Power Windows.
Are these positions the same for an 87 300D ?
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  #8  
Old 07-30-2012, 07:15 PM
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John did you find the ETM online yet?

Here's the MASSIVE electrical diagram for a 1st gen 124, makes the 123 look downright simple. (Thanks BodhiBenz87, she sent me the link when I was helping her with the blown N40 dash light controller problem)

http://www.w124-zone.com/downloads/MB%20CD/W124/w124CD1/Program/ETM/ETM.pdf
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both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

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1987 300TD sold to vstech
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  #9  
Old 07-30-2012, 07:52 PM
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Is there one relay for all four windows or are they split up with one for the front and one for the rear??
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  #10  
Old 07-30-2012, 09:29 PM
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Quote

Quote:
Originally Posted by daw_two View Post
Are these positions the same for an 87 300D ?
Source: The info came from ETM for an '87 300D Turbo, which is now Sixto's "white car." So the answer is "yes."

It1fire:
One relay for all four windows. The power then goes through two different fuses (#G -- LF, RR) and (#H -- RF, LR) and then to the switches and then to the window motors (and so forth). Source: ETM for '87 300D Turbo, pp.139-140.

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
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