Grandson, 16 yrs old, has just acquired a '97 Nissan p/u that has been lowered. He has asked his dad and me to help him raise it back to stock height. Neither of us knows what was done to truck and the "doer" is unknown to any of us. Any advise would be greatly appreciated.

2nd problem/question- how does one check an electrical relay? It appears that Nissan has a secondary business of making relays; this little hummer is full of them!
Thanks!!!  

going by the date this was posted you probably have the truck back to norm,but anyway.If the dude just loosend the torsion rods down the just tighten these back up.Not sure if you know,but the truck rides on torsion rods, a long rod from your lower control arm to a cross member were you can adjust ride hight.Tighten to lift,Loosen to lower.The rear he maybe used blocks,just take those out.If you dont see a block he may have used new springs,you would have to buy some from a salvage yard. Your relays, depends on whats not workin, on those trucks there are also fusible links at the battery check those also...