Coolant circulation pump bad??

[will70724]

I just tested the fault codes through the climate control testing way.


I got code e 151.. which I l ooked up and it says its the coolant circulation pump.. open or short circuit.

I always thought it was the blower regulator because of the little amount it blows through the front ( but not the back)

What is my next step to testing the coolant circulation pump?

Thanks in advance.