It is inside the door post on the passenger's side, right near the area where the latch is. Remove the plastic trim between the passenger door and sliding door. It is a tricky one to find. I think you may need to remove the seat belt reel.
The regulator in my 90 ram van is in the ECM or ECU
It is the error for the barometric pressure switch and it is located inside the ECU requiring the ECU to be replaced. Most of the time it is a bad MAP sensor that is causing this issue.
autizone or junk yard
Its depends on what vehicle. Some ECU's you can still get from the dealership. But I had a 90 laser that needed an ecu, these guys helped alot. They rebuild ecu's and give quotes on others if they have. Good luck.ecmoutlet.com
YES: It is located between the firewall and the heater box. To access, remove lower dash covering behind glove box, and pull ECU down toward floor.
This is not the answer but it might help you get the answer. Call Autozone, they will help you with any car questions you have.
It's MD128625 E2T34474 E705A or 6/90-6/92 - MD166260 E2T36574 E931
This will depend upon what "ECU" is - there are three different colleges that have ECU as their abbreviations, and none of them are colleges of veterinary medicine. Most veterinarians tend to settle at a salary of US$90-120k.
It should be found in the passenger side kick panel area.
Most 90's era vehicle had the turn signal flashed located at/in the fuse box - under the dash on the drivers side...
Replace the distributor mod, this fixed my 91 Dodge yesterday/
To reset the ecu, simply disconnect the battery terms for 90 sec. People say 60 sec. but I do 90 just in case. When you say "relearn", do you mean learn the same program that's already written in the ecu, or do you mean learn a completely different set of commands? If it is the first one, an ecu immedietly starts to follow the same commands but it can take a while if something has been altered such as AFR. This will cause the car to run rich or lean.