Jeremy, I love this man. I just had my coolant fan fuse blow and caught the temp slowly rising and wondered what was going on. The part numbers etc are great!

So my question is:
How can I make it chirp? I am fluent with relays, diagrams, etc Just wondering how to transfer this to an audible alarm. I'm thinking a door chime relay attached instead of the LED and/or use both. I'd prefer a more annoying alarm like, a lady quietly saying "hey your car is overheating, turn it off dumb ass or die." However, I would settle for a chime, chirp, or wailing sound.

What about a turn signal relay attached prior to the LED and then to a noise maker of some sort? When it clicks it would make something chirp instead of a bulb blink.



Also make sure the test switch is routed through a Bosch automotive 4 pin relay so the switch doesn't burn out. This is also a great way to turn on the fan if the system fails.