uhohitzluke

Hey guys,

I recently purchased my '07 AP2 and noticed that it had a different final drive than stock. So naturally, I compared the car's speedometer readings to a GPS-based speedometer on my phone and they are matched with very little variation. Based on that, I just checked the wiring around the ECM and expected to see a Modifry Yellow Jacket or Rick's Yellow Box or something friggin yellow in there lol. I couldn't find anything familiar to any speedometer recalibration devices that I knew of, so I'm asking if you guys can identify what kind of device is on my car because I do know there is some non factory wiring. Please check out the pics below.







I suspect the black cube with the black wire and colored terminals is the device, but I'm not entirely too sure. What do you guys think?

boyguan

Not hooked up?

Looks like a starter cut relay for alarm but never hooked up

uhohitzluke

I guess I should have taken better pictures, but there are wires on both ends of the green terminals, just not on the blue and red.

freq

I see a red half-tap in there too.

Someone has played with those harnesses.

realblag

Looks like leftovers from an aftermarket alarm