My Relay Board Seems Naked, Heater Fan Not Running Options

[Trav012000]

I figured the word naked would get some more hits. (IMG:style_emoticons/default/bootyshake.gif)

Anyway, I've got a link here to a picture of my relay board. Now I've been racking my brain for the past week or so trying to track down the problem that's causing my heater fan not to work (as its going to get cold here in the next week or so). Now if I'm reading diagrams correctly, then my relay board is missing a relay for the heater fan. Take a look and let me know if I'm right. I don't need the relay for the rear window defogger, but how about the other relays, should my car not be running?

I've got a 76 that the previous owner converted to dual webbers. Other parts that are kind of important that currently don't work are horn and fresh air blower. Am I lucky enough to just be missing the relay for all three? (IMG:style_emoticons/default/biggrin.gif) (I've not actively sought to fix them just yet)

http://fultonglass.com/relay.JPG

Thanks for the help.

[trherald]

I had a similar issue with my 914 when I first got it in July, and the problem ultimately seemed to have several sources:

1. The fan wasn't even connected! Once it was connected, it still didn't work.

2. The relay was in place, but always seemed to be activating, even when it shouldn't. This was eventually tracked down to a short in one of the traces on the relay board - replacing the board solved this problem.

3. The main power feed on the large connector (top of relay board) was loose and not contacting the pin properly. This is a tough one to solve because you can't buy either the connector or the pin......

4. The switch on the heater control inside the car wasn't connected. After a few hours tracing wires and testing continuity, as well as cleaning the switch, it worked fine.

As you can tell, most of the time was spent with a multimeter tracing wires, testing continuity, testing relays, etc. Time consuming, but not difficult.

After all that, the blower motor now works - at least as well as it ever did.