... come on when the brake lights go on? They're red so I just think it'd be cool. Right now my dice are just wired through a switch which gets power from a "BATT" terminal in the fuse box. How could I go about doing this?

I'd like to keep it so that I have the same functionality as now, where I can flip the switch and leave them on when the car is parked. Maybe a 3 way toggle switch?

 

The easiest way would be to power it from two places. One power would come from the brake switch and the other one you already have in place. So all you really have to do is wire in a power wire from the brake switch.

 

Does the famous Trickster have a wiring diagram for the switch? :hail:

 

While I don't have the exact wiring diagram for the 89 firebird handy, I do have the diagram for an 89 camaro which should be similar enough for you to get the general idea. I have also included the diagram for the third brake light since it operates off a seperate circuit in the brake switch. I thought I would get this to you before Charley starts knocking on the door.

 

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Trickster, where do you pick up these schematics? THANKS!

 

Handy Dandy GM service manuals for the various years.

 

Ah, yes. That would explain it completely. How do I go about picking up a manual for an 85 iroc?

 

There's one slight issue with just powering it from 2 places. If you pull a wire from a switch and another from the brakelight switch and tie them together at the dice, then the brakelights will come on anytime you turn on the switch. Something tells me the local cops might not like that too much.

You need to use a 3-terminal switch. Wire the middle terminal to the dice, one end to the brakelight switch (I'd use the 3rd brakelight wire personally, so that if there's a problem it won't interfere with the regular brakelights,) and the other end to the fusebox terminal you're using now. My

 

There are about 3 on e-bay right now that should be ending the auction within the next couple of days. Just keep watching them and you might get one for a good price. I got mine for $15.00 + $4.50 shipping.

 

Hmm didnt think about that brake light issure. You could also use a diode to prevent power from the dice circuit entering the brake light circuit.

 

That's what I figured, an ON-OFF-ON type switch, where the First ON would be wired the same way I have now, the 2nd ON would be tied into the brake circuit.

Thanks for the Diagrams Trickster!

 

Finally getting around to doing this... I'm not sure what you guys were talking about w/ the diode. But from the 3rd brake light diagram, I'm gonna splice into the YELLOW wire coming off the switch and wire that to one of the ON positions on my switch. (ON-OFF-ON) The first ON is constant while the second ON is from the brake switch. The dice have their own ground. Do I have this right?

 

Yep.

 

A diode is just a one way check valve for electricity. Avalable at any radio shack. It would have allowed the use of a single pole single throw switch with out getting the feedback into brake light circuit. The way you have it wired up is perfect thou so a diode isnt necessary at this point.

 

what if you used a relay? a single pole double throw relay. connect terminal 30 to the dice, terminal 87a to the brake lights, 87 to a 12 volt source. terminal 85 and 86 are the coil, one goes to a switched 12 volt source the other ground. so to have the dice light with the brake lights turn switch off. to have them light when you want them to turn the switch on. if ya need any further explanation drop me a line. hope this helps.