Turn Signal Flasher Box Help

[MHarrisEP]

Hi, I just got my first car ('96 Accord EX) a few months ago, and since then I've been having a lot of fun learning about it and doing what I can to modify it. My budget and knowledge pretty much limits me to simple things. I threw in a neon, and added a sound system, things like that.

 

Now I'm looking to modify my turn signals, so that I can control the rate at which they blink.

 

I took my flasher box out and opened it up. From what I've read elsewhere, you can replace one of the resistors with a potentiometer to control the rate.

 

My question is why resistor do I need to replace?

 

 

There are three, as shown above with their values. I believe I got the values correct.

 

Shorts of trial and error, I thought this would be the best way to find out.

 

Any help is greatly appreciated!