A/C wizards! Need help with Denso system, receiver drier switches

[cabriodster87]

Yes...that is the switch I have. AND I have the female connector it plugs into as well...but no wires that actually go inside that connector. Its just a shell of a connector.

Then follow the procedure in the link a few posts back, splice one pair (high) together and plug the other pair (low) to the new switch.

[brahbarian]

Green one is high pressure. The stubby black one is low pressure.

Fudge. So I switched out the wrong switch.
Hopefully I switch out the black switch and it'll work!

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[cabriodster87]

Green one is high pressure. The stubby black one is low pressure.

@boy412
Ok, i seem to be thoroughly confused, the conversion switch hooks to the high cutout circuit and serves dual purpose?

Fudge. So I switched out the wrong switch.
Hopefully I switch out the black switch and it'll work!

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@brahbarian
If your compressor energized when you closed that circuit its either a bad switch, or not tight enough (ohm it), or you don't have enough freon. Assuming the other circuit is closed.



If im wrong someone with more experience will set it right.

[brahbarian]

I'll double check. What ohm should it be at?

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[cabriodster87]

Zero or closed.

[boy412]

Then follow the procedure in the link a few posts back, splice one pair (high) together and plug the other pair (low) to the new switch.

How would you plug the other pair into the new switch? The connectors are different. That is what I have been trying to illustrate (and apparently not very well).

Here is another photo showing what I am working with now. From left to right we have the existing connector for the green pressure switch, the connector for the NEW "single" switch, and the remains of the connector for the stubby black switch.



Clearly you can't just plug the new switch into either of the existing connectors. That is why there is a new connector needed. And the one that everybody sells does not have the female sockets in it...its just an empty shell. Now I could just snip off both connectors and use butt splices or some other type of connector but that would be "wrong".

[boy412]

@boy412
Ok, I seem to be thoroughly confused, the conversion switch hooks to the high cutout circuit and serves dual purpose?

That is my understanding. Although I've also read it doesn't matter which circuit you use. I've mostly seen the high pressure switch replaced with the new switch so that is what I'll be doing.

[cabriodster87]

I cut the old switch pigtail and spliced in the new with wire connectors and shrink tubing. Then spliced the black switch wires together and tucked.

[boy412]

OK...so I could have made my own connector but I decided to maintain SOME level of OCD.



I sourced a pair of 2.5mm snap-in connectors from one of the local BMW dealers. Pretty surprised they had them! ECS Tuning only sells them in packs of 10...screw THAT. Anyway...these were the missing link in this whole project.

Here's a photo showing them along side the plug I had bought previously:



And another photo showing the complete assembly:



So if you want to do this "The BMW Way" you will need these parts:

1x 61131378400 (plug terminal, 2-pin)
2x 61130007442 (2.5mm snap-in socket, watertight)