[4wdave]

1988 560SL. While reinstalling aux water pump after repair, I found these wires and plugs dangling near mono valve. But I couldn’t find any empty sockets?

the upper pair of wires/pins look like they should go to a lamp socket. The other one has a plastic connector with two pins: 2 brown and 2 blk/yel to each pin.
Any ideas?

 

[roncallo]

1988 560SL. While reinstalling aux water pump after repair, I found these wires and plugs dangling near mono valve. But I couldn’t find any empty sockets?
View attachment 2811527
the upper pair of wires/pins look like they should go to a lamp socket. The other one has a plastic connector with two pins: 2 brown and 2 blk/yel to each pin.
Any ideas?

Is there a 126xxx part number on the harness. If yes one goes to the hood switch at the center of the firewall, and the other is not connected.

 

[jaymaynard]

Those may be for the burglar alarm that was standard on the 560SL.

 

[rdelpino]

I'm in the middle of reconnecting my wiring harness. The top connections go here:
For the wire circled on the bottom of your picture. I think it would help to see the other side of the connector.

 

[4wdave]

Roncallo, I couldn't find any part number on the harness.
RDelpino, I don't think it's for the sensor in your photo. Those are already connected on mine. Here's the underside of the connector:

And this is the switch mentioned:

What does it switch?
It looks like something is missing here...

And I can't see any evidence of burglar alarm on mine?

 

[rcrmonte3]

That switch looks like it's supposed to turn on an underhood light when the hood is opened.

 

[jaymaynard]

I believe it's an anti-tamper switch, which sets the alarm off when the hood is opened and the alarm is armed.

 

[4wdave]

Is there any way of knowing if an alarm was installed, where it is, or what it would look like? Or how it is armed/disarmed?

 

[jaymaynard]

My 560SL doesn't have the alarm at all. There's an open space forward of the monovalve where it would have gone. I can't tell from your pictures, but that's where it would go.

 

[roncallo]

Roncallo, I couldn't find any part number on the harness.
RDelpino, I don't think it's for the sensor in your photo. Those are already connected on mine. Here's the underside of the connector:

Those wires are for your windshield washer nozzle heaters.

Switch activates the alarm if someone opens the hood.

Bugler alarm was probably disconnected. There should be a horn right below the mono valve. And and alarm control module behind the glove box.