1976. Are the headlight motor relays, and the relays in the relay panel in the engine compartment (power relay, fuel pump relay, heater fan relay) the same? PN 91161510901? If so, any others that are this PN?

Yes, the same.

Thanks!

As best I know there are 2 maybe 3 different versions of the round 5 pin relays Porsche used.
The round black ones used in the 914 and other Porsche's,.

There was also a round red version used for 911 fuel pumps that has a higher amperage rating.

They all function the same just higher amperage for the red ones.

I also have some white ones from a 914 and I think they are the same as the black ones.

Jim

I have a question, I put a brand new relay in and my heater fans started running, replaced with a different one and they worked fine. I am thinking I have a bad relay out of the box, is the correct?

Yes, you get bad ones brand new

The early cars had metal covered relays.

Man, I hate it when that happens! Thanks.

the bad ones were made by URO, we have had many, however URO is working on improved ones and will have them shortly, right now everyone is out of stock of every variety except the genuine porsche parts which we have many but they are expensive, yet work everythim. (how is that for a run on sentence?) 91161510901