14 pin connector assignments, need 75 pinout for suby conversion Options

[jpnovak]

I have just about completed the wiring for my $2011 GRM Challenge car.

I am converting a 1975 914 to WRX powertrain. The car came as a roller and the 14 pin connector shell was missing. Just dangling wires so I have no reference for pin position.

I just have to connect the battery and have a few wiring connections.

I am only using the following connectoins:

yellow starter wire (pin1 on my 911)
blk/pur tach wire
blue alternator field wire
black alternator wire

The two red wires is my confusion. I think these both go to batt+ Are either switched 12V? On my 911 there is both 12V hot and 12V switched. I would assume the larger diameter wires is 12V hot and the smaller diameter is 12V switched.

Can anyone confirm? Thanks.

I am hoping to fire the engine for the first time this weekend.

[Mike Bellis]

The reds go to the battery. One ends up at the fuse panel and the other goes to the ignition switch to give it power.

[jpnovak]

Thanks Mike,

I just found a wiring diagram on PP.

Here are the assignments.

T14-pin 12 is power to the relay panel direct from the battery
T14-pin 14 is also power to the relay panel through the engine compartment fuse.

Both Pin 14 and Pin 12 attach directly to the battery.

A separate 12V hot connects the battery to the starter and then to the alternator.


There is a separate battery connection that is two red wires coming off a ring terminal at the battery. These go to the wiper switch and ignition switch. A black wire comes from the ignition switch to T14-Pin8 for 12V switched.

I now have everything I need for final engine connections.

With luck I might get the car started this weekend.