moalaska

Reinstalling my wire harness. Is this perhaps an unused connector or is the other end tangled up somewhere under the glove box?

Dare

Internal test connector for engine wiring harness.

This does not appear on the diagram for the '86 951 (first appeared in '87), but it was present in my '86 951, albeit with slightly different wiring.

The wiring on my car was as follows:

moalaska

Does it actively plug into anything or is it just there until used for testing purposes

Dare

'87 wiring diagram says "test connector" and show no connection. So I'm pretty sure it's just open on the '86 as well.

Tom M'Guinn

There was nothing plugged into it on my '86 or a friend's '88S. It did move from behind the glove box to the corner of the metal DME/KLR frame on the later cars. It's the perfect place to wire in a knock counter, however, since it has power, ground and the KLR's curiously unused knock output.

Humboldtgrin

It could be for extra options for your door? Like central lock?

Tom M'Guinn

Seems pretty clearly a test plug for some diagnostic equipment that may or may not have ever been built. It just has power/ground plus the largely undocumented KLR knock output, the blink code signal, and another "diagnosis" signal from the KLR...

moalaska

oooh i made a nice blink tester, would You happen to know which wire is for the blink output?

Tom M'Guinn

It's the 1mm solid green wire. Pin 3 of the KLR outputs the blink code. There are actually two green wires attached to KLR pin 3. One goes to the LED port under the hood, and one goes to that rectangular connector...