SeanR

I've been fighting with an '88 (no alarm) locking issue after taking out an after market alarm system. I will spare the gory details of the crap job way it was installed and the mess that I've had to clean up so far. I'm down to the last part of the rewiring of the car and can't get the locking system to work.

As I'm following wires, checking 400ma fuses and testing continuity I run in to this mess of wires that come from a harness bundle behind the CE panel. There is crap soldered all over it and was going to just remove the bunch, until I found it going in to a stock harness that I can't seem to trace to anyplace.

I hope the pictures come out so you can see the wire colors, but I can't find a match any place in the WSM.

Adam Geist

Sean,

I'm interested in your post as well. I found the same wiring/harness plug on the gold '86.5 this past weekend. It was sitting on top of the CE panel. The locking system doesn't work properly on the car either. The driver side locks but the passenger side does not.

I also looked at the wiring diagrams and gave up.

Adam

SeanR

I've got the opposite. Drivers will lock all, but not unlock. Passenger does lock/unlock. Center Locking button will lock only with key on and nothing else. The only thing that I can't get straight is this bundle. Even checked my '88 and it doesn't have this.

Did you check those hidden fuses that are on the top, clamped behind the panel?

Adam Geist

Sean,

I didn't check the hidden fuses - I'll do that tomorrow night. The green '86.5 also has the same connector on top of the CE panel.

I also haven't been able to figure out the purpose of the wiring bundle/connector. It looks like a dead-end connector - but with jumper wires.
Adam

SeanR

It's for something we don't have, seen that one many times and forget what it's for.

Louie928

I believe that is plug T22. It's on page 9 of your '88 wiring diagram at D77. It is part of the alarm system wiring. Often one of the first things messed up in the installation of an after market alarm or to defeat the immobilizer, or alarm horn.

Louie

Alan

It is indeed T22 and it looks like it has had some "work" done to it.

Trace the connections and verify - assume you do have the FWM's?

Alan

SeanR

Yup, got them and when I get home this evening I'll jump back on it.

Thanks guys.

Alan

Here is a helping hand:

You have suffered an Alarm-ectomy - I assume since its all disconnected...

Here are the pin assignments:

1 - Yellow - EZK enable (the alarms ignition disable)
2 - Black - ~Ignition from the ABS
3 - Brown - Ground
4 - Black/Red - Ignition Feeder
5 - Red/White Horn - Output from Alarm
6 - Red/Black - Battery +ve
7 - Brown/White - interior lights switchd grounds (trigger)
8 - Red/White - Activation to Horn

The yellow jumper from 1-4 is for the ignition disable defeat.

BTW - that unwrapped soldered joint is probably battery+ and in stock configuration it is an unfused feeder direct from the battery.... very nasty - wrap it up!

Alan

Stromius

Sean -

I have an 88 with similar wiring. I also have the Z clip which you don't appear to have (top right). Most of my either factory or after market alarm is removed with a few, unconnected senors still in place.

My only mystery wire is what I assume to be a brown ground wire (with tape).

I am glad to provide you any pictures you need to resovle your wiring.

On door locking, I have checked the 2 400mA fuses as well but experience the same locking dynamic. Locks from passenger but not driver unless I open and close the passenger door, then lock. Mostly I lock the drivers, walk to the passenger side and when I just open and close the door, the locks cycle to locked.

Alan

Damstrom - what did you mean by the Z clip?

It seem you also have quite a lot of aftermarket fused connections and no alarm - same bypass - its possible both of these were factory no-alarm bypass - since its in the correct color...? and correctly installed. That would be unusual for a USA car though - seems most had alarms.

Alan

Stromius

I am probably mis-naming the part but have circled what I thought was the naming covention.

So is this T22 plug Sean and I have uncommom in US cars? I guess I am still learning here but would greatly appreciate this thread and your expertise.

Stefan

Alan

Oh thats what I'd just call a "Relay Bridge" It connects 30-87 on the socket and 'may' be a stock Porsche part. You have one because you have a manual car and your backup lights are switched by the transmission switch in series to this. Auto trans cars have a relay here controlled by the low power handling gear selector switch. Does it have connections soldered to it? looks like it... this is not stock - this is an ignition controlled fused feeder (Fuse 12).

The plug 22 is normal - the mostly unpopulated side you have is usually configured in a short harness that goes to another pair of connectors that plugs directly into the stock alarm module (usually in the console or up above the glove box/CE panel). The jumper in yellow between pin 1 & 4 looks to be factory colors and properly installed in the housing... maybe it came that way...

Alan