What is this relay for?

[Haasman]

Part # 91161510901



It is located by the fuses in the trunk (lower left in picture below)

[beh911]

Horn most likely

http://www.early911sregistry.org/for...power-to-horns

[kentf14]

Beat me to it. I was going to say horn also.
Here's the pic from the thread mentioned above.

[Haasman]

Thanks .... interesting thread in how it progresses over three pages.

I did realize that the horn(s) stopped working yesterday. Thanks, I'll try and figure it out.

[edmayo]

That's a 'universal' relay, used for a number of different functions, horn being one of them.

[Haasman]

Thanks for the replies. Interesting in the myriad of electrical events, the horn quite.

I've been trying to solve-

-brake lights come on when lights (parking & headlights) are on
-Turn signal indicators in tach both illuminate when using left or right blinker
-replaced failed headlight switch

So far I-
-replaced rear light housings (OEM), cleaned & restored front turn signal housings
-replaced all the fuses in the trunk with copper style instead of aluminum

Yes, of course grounds, but I will check all the housing grounds again, but I did clean and use dielectric grease on all contacts.

I have noticed that the new rear light housings are not making excellent contact with the bulbs, that surprised me. I guess I need to bend the bulb connector contacts more.

Oh these electrical gremlins! Starting to try my patience!

[RSTarga]

I've had poor experience using dielectric grease on contacts, I mean after all it is supposed to inhibit electrical transmission. I prefer a light coat of WD40.

[Haasman]

David, was just thinking about that. Maybe I'll go back to ye 'old WD40 and start there. Maybe the grease actually is inhibiting good conductivity.

[beh911]

Thanks for the replies. Interesting in the myriad of electrical events, the horn quite.

I've been trying to solve-

-Turn signal indicators in tach both illuminate when using left or right blinker

I had the same problem and after going through all grounds, I replaced the flasher relay and it did the trick (found behind instruments, inside trunk). Got it from Pelican:


Horn quitting could be a red herring, unrelated to other issues. Try swapping a known good relay and see if that fixes it

[edmayo]

Take your tail light housing out, and using a 12 v test light verify that you are getting the proper signals at the right color wire when lights, turn, and brake are applied.