Yes
On the B250 van the blower resistor is located behind the passenger glove box, remove the glove box shell and resistor is located just to the right side, you can't miss it.
No.
Change the canister.Change the canister.
A Dodge B250 Van does not have a mass airflow sensor.
1-8-4-3-6-5-7-2
I have a 1989 Dodge B250...it has overdrive
Sounds like the blower motor resistor is on the fritz. Replace it and it should work. I am not familiar with that model or I would tell you where to look. Usually on the passenger side of the inside of the vehicle under the glovebox area. Hope this helps.
Why would you want to bypass the computer? In any case the answer is no, you cannot by-pass the computer.
No.
Center of the firewall.
Yes
we need more info on this application like what year and what is a b250 i would suppose it was a dodge