Hey and welcome to my first posts. Great forum and site btw.
I have a 1990 B2200 - 5 speed manual - 2wd.
I have it rigged to run partly on brown gas which gives me around
29 mpg (in town) and still improving. I was in the process hooking
up my system on a "ignition on" source on the passenger side
under hood close to the firewall. So far so good untill I hooked up
my second system and the car died instantly like someone cut the fuel supply or pulled a vacuum hose from intake.None of this happened and
after checking for voltage at the connection I hooked up to, there is none. Truck runs and drives fine as long as you dont take foot from pedal.
I checked the other "environmental gadgets" and none have power.
So I must have blown a fuse or link some where. Can not find any fuses or fusable links in the egr system though. Thats were you come in and advise me if there is any and where it is. Can you help me guys. I have attached a picture pointing to the connections.

 

Hi,
Just to let yo know we fixed the problem.
Had my buddy at work look at it (he is a car tech) and
after 2 hours looking at wiring diagrams and checking
amperages, voltage and connections under the hood and at the ecm
we found the problem. We changed the "engine fuse" in the fuse box.
My budd said:" Thought you checked the fuses!!!!!" Yes I did but must have overlooked that one. It is a 10 amp and is for the ecm. Well that made perfectly sence. Geez, he was pissed.We are even ow since he still owed me a bottle of Rye from a sports bet.
This might come in handy for some.