How do you know if you have 3 or 4 channel ABS?

 

i believe 3 channel has the sensors on the rear diff while 4 channel has one on each side of the rear axle. what year is the car?

 

one way to tell is to look on your rearend housing and see if it has one sensor and wiring connected to the pumpkin (3channel) or if it has 2 sensors one at each end of the axle tubes (4channel)
another way is, i think, is only cars that have traction control have 4 channel ABS, does your car have the traction control button?

 

My car is a 94 and the only traction control I have is not enuff mods!

 

You have a 3-channel for sure.

 

yep definitely 3 channel.