Asking for a friend. The car is a '72 with automatic transmission. :Looking for an i.d. on the relay on the firewall. Thanks.

I believe it has to do with turning on the second set of points under certain conditions, for cars that have two sets of points, like auto's. BE-5 in the 72 FSM shows the relay doing this job, but not its location. 

Edited November 20, 20204 yr by zKars

Could it be an early version of a Neutral safety switch?

2 hours ago, zKars said:

I believe it has to do with turning on the second set of points under certain conditions, for cars that have two sets of points, like auto's. BE-5 in the 72 FSM shows the relay doing this job, but not its location. 

Actually the location is shown in Figure BE-1. I don't think it's the thermotine relay. The FSM says that is located on the driver side fender well. 

How many pins (wires)?

What are the wire colors?

What is the manufacture date?

Edited November 21, 20204 yr by cgsheen1

3 hours ago, jfa.series1 said:

Asking for a friend. The car is a '72 with automatic transmission. :Looking for an i.d. on the relay on the firewall. Thanks.

 

Jim, ask your friend to clean the wires and identify the colors of the wires/stripes. The FSM shows that there is something branching off the wiring going to the wiper motor, but it fails to say what that branch is going to.

Also, see if he can take a closer photo of the relay. I can't quite make out the part number.

And after searching the interwebs and digging through the wiring diagrams, I found the answer...on this website: https://www.classiczcars.com/forums/topic/36059-372-240z-automatic-transmission-what-part-hooks-to-this-connector/ 

 

From the 73 FSM...since the prior year FSMs don't document this circuit worth a darn.

Yup. That's what I found in the '73 FSM. Got to be it.

My buddy's 73 has a different shaped relay in the same spot. I can't recall its function but we traced it in the harness and found it in a wiring diagram and determined it was not needed.

The ones I have seen mounted there are more shaped like the horn relay long and skinny, not square like this one. 

It also had a short pig tail on it rather than the plug right on type like this one. 

I too was under the impression it was for the auto metic transmission models, possibly to do with the duel points. 

That relay looks like the one from under the dash on my ZX (pic) May have been changed out at some point?

 

Edited November 21, 20204 yr by Terrapin Z

Thanks guys. A request for more details has been sent to the owner.

Jim

The owner will be away from the car for a week but did have a closeup pic of the relay. I can get 25230-89918 and R3-11 visible #'s.  I noted there are two black/yellow and two green wires visible. Beginning to look like the diagram in @SteveJ post #7.