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Convertible top relay codes

Tiny
DIVIDES
  • MEMBER
  • 2009 BMW 328
  • 2WD
  • AUTOMATIC
  • 146,000 MILES
Bought it as is, does not work. Checked the switch and it is loose so I ordered another one but there are two codes for relays. I want to check and see if they are okay. Where are they located?
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Tuesday, December 7th, 2021 AT 5:58 PM

27 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

The relays are located next to the top hydraulic unit. If you look at pic 1 below, I highlighted them. Note, you have to remove the cover to access them.

In addition, I included the wiring schematic for the top. The schematic was two pages long and I had to cut each page in half to make it readable for you. I did overlap them so you can follow from one to the next.

Here is a link you may find helpful when testing the relays:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below.
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Tuesday, December 7th, 2021 AT 9:31 PM
Tiny
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Is this on the right or left?
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Wednesday, December 8th, 2021 AT 6:15 AM
Tiny
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I don't see any relays on the left side. Right side is just the battery.
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Wednesday, December 8th, 2021 AT 10:58 AM
Tiny
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I found then under the black cover. Both relays corroded from water, two large wires corroded and gotten lose from the relay connector. I want to buy the piece that the relay connects it sits in, what is it called? If I can't find it I will have to find some spray that will release all this corrosion and the reconnect the two wires.
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Wednesday, December 8th, 2021 AT 1:04 PM
Tiny
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Can you find me the relay numbers please?
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Wednesday, December 8th, 2021 AT 1:05 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

Can you send me a couple of pics, so I know what you want to replace? I believe the relays are in the hydraulic compartment and have connectors to them. Is that correct?

Let me know.

Joe
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Wednesday, December 8th, 2021 AT 8:27 PM
Tiny
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Attached. One of the problems is that I don't know where these 2 wires will attach in the relay socket.
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Thursday, December 9th, 2021 AT 7:26 AM
Tiny
JACOBANDNICKOLAS
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Hi,

Are both wires solid red in color? If they are, they are the power supply. See pic 1 below. They receive power from fuse 106 (50amp) in the under-hood fuse box.

These two wires are will actually provide power to the unit when the relays are actuated.

If you look at the schematic below, you need to pair them with the black wire and the black wire with a red tracer out in the connector. On the relay, there should be a small, embossed pic showing which pin is required. Since both are red, one will go to each connector. The others are still connected, so chances are you should be able to tell where they came from.

Check to see if one of the two wires has voltage or if both do.

Let me know.

Joe
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Thursday, December 9th, 2021 AT 4:32 PM
Tiny
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The socket is so corroded and other wires are missing. I just ordered this short harness along with two new relays. I will let you know how it goes.
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Thursday, December 9th, 2021 AT 5:17 PM
Tiny
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Hi,

I totally understand. It does look corroded pretty bad. I hope this takes care of the issue and look forward to hearing from you.

Take care,

Joe
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Thursday, December 9th, 2021 AT 7:17 PM
Tiny
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Can you get me the part numbers for the 2 relays on this hydraulic pump? I ordered 2 but they have 5 prongs not 4. I don't understand how all those being sold are 5.
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Friday, December 17th, 2021 AT 12:13 PM
Tiny
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Still no luck, all 5 prongs, even though they look the same, and all BMW owners reported replacing them with this part number 12631742690.
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Friday, December 17th, 2021 AT 12:34 PM
Tiny
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Is there any information on the old relay? My manual isn't providing the part number.

Let me know.

Joe
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Friday, December 17th, 2021 AT 4:36 PM
Tiny
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Old one.
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Friday, December 17th, 2021 AT 4:42 PM
Tiny
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New.
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Friday, December 17th, 2021 AT 4:44 PM
Tiny
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Prongs.
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Friday, December 17th, 2021 AT 4:45 PM
Tiny
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Does the 5th pin looks like it's broken? Maybe it's broken in the socket that's why it won't fit.
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Friday, December 17th, 2021 AT 4:47 PM
Tiny
JACOBANDNICKOLAS
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Hi,

I attached your pic below and circled where it looks like rusted metal. Is that spot metal? If so, then it does appear to be a broken pin. I looked at the pics you have above and that is right where pin "5" would be located.

If you look at the inside of the original connector, is the pin in there?

Joe
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Friday, December 17th, 2021 AT 5:08 PM
Tiny
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I will check, if it is broken then that is what is going on.
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Friday, December 17th, 2021 AT 5:22 PM
Tiny
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Yes, I think it is.
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Friday, December 17th, 2021 AT 5:46 PM

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