Seiko A/C Compressor Wiring

[mcaden]

My seiko A/C compressor (6452 1386 464) has three wires coming from it - 2 are red/black and 1 is black -- that have been cut (I believe there should be a connector attached, but it appears to have been cut off and I have three exposed wires). My high pressure switch has one red/black wire that has been cut and is also exposed. I am trying to hook back up the system and can't figure out how the wires attach.

Clearly one of the red/black wires goes to the high pressure switch or are the 2 red/black wires connected together to the high pressure switch? Where does the black wire go (ground/power)?

I appear to be having the same problem as the person in this thread and he has a picture included. See link:

http://www.r3vlimited.com/board/showthread.php?t=248559

If someone could post some pictures of their wiring for a seiko compressor that would also really help.

FWIW, my a/c system actually works because a PO hacked the compressor wiring to create an on/off direct compressor switch, rather than fix the lower pressure switch. I have now replaced the low pressure switch and am trying to return the system to how it was designed. I have consulted the wiring diagrams to no avail. My car is a 1987 325ic.

Many thanks for your assistance!

Marc

[mcaden]

So I think what I am trying to do is adapt a later model Seiko compressor's wiring (with the later style 3 wire/wiring harness; with triangle shaped adapter) to an earlier style car. I think this Seiko compressor is adaptable, I just need help with where the two red/blk wires and the one blk wire should go. Surely, someone has done this before, right?

Thanks,

Marc

[Schwarz325i87]

I second that motion. I myself am having the same problem and have not had any feedback in other forums as well. These swaps are all over the net and world so surely someone can shed some light on this.

In my situation, I live in Texas where its very very hot and i need to remedy this very soon.

[mcaden]

I received the answer I was looking for from another forum, but wanted to post here for the benefit others. Here is the answer:

2 of the compressor wires (red/blk) are to a thermal switch while 1 is to the clutch (blk). The whole circuit basically is to put the high, low (or high/low), thermal overload, and finally the clutch in one series circuit so that any of them can cut the clutch. The 3 wire connector goes like this:

Pressure switches -> connector -> thermal switch -> connector -> jumper wire -> connector -> compressor clutch

I merely had to join the black wire from the compressor to the red/blk wire from the high pressure switch. I decided not to use the thermal switch, so I bundled those wires together out of the way, but the thermal switch could easily be wired. I now have ice cold A/C. :-)

Hope this helps others.

-Marc