I have just purchased a 84 CUCV Blazer & am trying to get it running. I have changed the key switch, Put in new batteries & checked the starter. I am not getting power to the starter solenoid. Where is the starter relay, what does it look like & how do I test it? Are there any other relays or circuits that need to be operating/engaged before the solenoid is energized? I am new to the Diesel world & am trying to figure it out. Any help would be appreciated.