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PSE Electronics: The saga continues


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The purpose of this posting is to both ask more questions and to archive some additional tricks for those of you who stumble upon it by a search.

Situation:

I am retrofitting a 2002 C2 with factory PSE with a PSE switch. All wiring up to the relay is in place.

Question:

How much attention should I pay to the color of wires because the wiring diagram for the PSE

does NOT agree with the wiring colors to my 996 618 980 02 PSE relay (note, the -03 is the current rev).

See enclosed picture:

1) Instead of 2 RD/BU wires I have 2 BK/BR wires that go to position 11 in the relay support.

This wire is hot whenever the engine is on. I think BU = BLue

2) Instead of a GY/RD wire going to the rear valve, mine is BR/White

The others are the same.

Should I hook the common of the PSE switch (A4) to

the same BK/BR wires the relay is hooked up to, or the RD/BL wire which goes to the common

of the PSM switch on the dash? That lead is always hot. Chances are that it does not matter.

Trick

The relay support holder was an absolute bear to remove. Some of you are luckier.

For some reason, two of the four "feet" that supports the door side of the holder

were jammed behind the bar for the clip and I could not get enough leverage to

slide the panel out. And, yes, I did remember the nut holding the other end.

The trick is to simply loosen the bolt that holds that bracket. It a couple of inches

above the "feet" and it slides right out. See enc pic. I had to bend the plastic bracket to get it

out.

Notes:

The correct PSE switch numbers are:

996 613 987 10 A05 Black mat switch (for left side of dash)

996 613 988 10 A05 Black mat switch (for right side of dash)

The Porsche publication "Exhaust system/Sport Exhaust 06/02 2601 Group 2" has it reversed.

Either that, or the supplier randomly applies the left & right on either switch.

If you want to be really anal, then you can get OEM tip switch socket make by VW/Audi.

The part # is 443 972 995 but it has been superseded with 8N0 971 636 (about

$5 at VW and 10$ at Audi. Go figure. Porsche could not look it up).

The pin out for the lighting for the tip switches are not all the same. Some use the common A4 and A3,

others use A3 & A5. So be aware when you hook things up from neighboring switches. You may

want to check it out with a Volt meter first. The trend seems to be that switches with an indicator

light use A4 and A3.

Here is how to decode the tip switch pin outs. I am sure it's listed somewhere but could not find it.

Look at http://www.gagme.com/greg/Boxster/hacks/garageswitch.html

(basically look at the rear of the switch with the horizontal male connector on top)

A = A3 (upper left)

B = A4 (common)

C = A4 (upper right)

D = A1 (lower center left)

E = A2 (lower center right)

And of course thanks to Loren and Orient Express for their patience with my questions.

Jan

I should have labelled the relay support holder bracket picture a bit better.

The bolt is in the upper right hand corner of the picture, and the bracket

slide out in the direction of the bolt. The slightly mangled black plastic edge is where the relay support slides in.

post-1353-1131566609.jpg

post-1353-1131569865.jpg

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Jan:

So wire colors can be different from year to year, but the pin-outs on the relay are the same. You still want to install a line into position 7 of the relay socket for the on signal from the dash switch, and a line into position 4 for the dash switch indicator light.

Also, see that pick grey wire on the relay socket? That is the one you want to clip so that the 30-45 mph "quiet mode" is disabled.

sounds like you are getting close to completion. :clapping:

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